diff --git a/include/rigid_paradise/csv/csv-base.h b/include/rigid_paradise/csv/csv-base.h
index 8a4dd06..e7bc326 100644
--- a/include/rigid_paradise/csv/csv-base.h
+++ b/include/rigid_paradise/csv/csv-base.h
@@ -54,10 +54,10 @@ namespace csv {
 	public:
 		std::map<cell_id, cell> data;
 
-		const cell& operator[] (const std::string_view id) const {
+		/*const cell& operator[] (const std::string_view id) const {
 			auto coords = get_coords_from_id(id);
 			return data[coords];
-		}
+		}*/
 	};
 
 }
\ No newline at end of file
diff --git a/include/rigid_paradise/lispy/lispy.hpp b/include/rigid_paradise/lispy/lispy.hpp
index 7b91a71..e9059b5 100644
--- a/include/rigid_paradise/lispy/lispy.hpp
+++ b/include/rigid_paradise/lispy/lispy.hpp
@@ -42,6 +42,8 @@ namespace lispy {
 		std::unordered_map<std::string, int> atoms;
 		int last_atom = 0;
 		bool error_crash = false;
+		std::unordered_map<int, std::shared_ptr<function>> function_table;
+		std::unordered_map<int, lvalue> variable_table;
 
 		int get_atom(const std::string& key)
 		{
@@ -56,12 +58,12 @@ namespace lispy {
 	class cons {
 	public:
 		lvalue self = empty{};
-		std::unique_ptr<cons> other{};
+		std::shared_ptr<cons> other{};
 
 		cons()
 		{
 			self = empty{};
-			other = std::unique_ptr<cons>{};
+			other = std::shared_ptr<cons>{};
 		}
 
 		cons(lvalue first) 
@@ -73,7 +75,7 @@ namespace lispy {
 		{ 
 			if(data.size() == 0) {
 				self = empty{};
-				other = std::unique_ptr<cons>{};
+				other = std::shared_ptr<cons>{};
 			} else if(data.size() >= 1) {
 				self = data[0];
 				for(auto it = data.begin()+1; it != data.end(); ++it)
@@ -83,27 +85,27 @@ namespace lispy {
 
 		cons(const cons& oth) 
 		: self(oth.self)
-		, other(oth.other ? std::make_unique<cons>(*(oth.other)) : nullptr)
+		, other(oth.other ? std::make_shared<cons>(*(oth.other)) : nullptr)
 		{}
 		void operator=(const cons& oth)
 		{
 			self = oth.self;
 			if(oth.other) {
-				other = std::make_unique<cons>(*oth.other);
+				other = std::make_shared<cons>(*oth.other);
 			} else {
-				other = std::unique_ptr<cons>{};
+				other = std::shared_ptr<cons>{};
 			}
 		}
 
 		cons(cons&& oth) 
 		: self(oth.self)
-		, other(oth.other ? std::move(std::make_unique<cons>(*(oth.other))) : std::unique_ptr<cons>{})
+		, other(oth.other ? std::move(std::make_shared<cons>(*(oth.other))) : std::shared_ptr<cons>{})
 		{}
 
 		void append(lvalue value)
 		{
 			if(!other) {
-				other = std::make_unique<cons>(value);
+				other = std::make_shared<cons>(value);
 			} else {
 				other->append(value);
 			}
@@ -112,7 +114,8 @@ namespace lispy {
 
 	class function {
 	public:
-	 	virtual lvalue operator() (cons arguments) = 0;
+	 	virtual lvalue operator() (const std::shared_ptr<cons> arguments, lispy::context& ctx) = 0;
+	 	virtual ~function(){};
 	};
 
 	inline char hexdigit(char v)
@@ -179,7 +182,7 @@ namespace lispy {
                 stream << arg;
 			} else if constexpr (std::is_same_v<T, empty>) {
                 stream << "()";
-			} else if constexpr (std::is_same_v<T, function>) {
+			} else if constexpr (std::is_same_v<T, std::shared_ptr<function>>) {
                 stream << "#func"<<&*arg;
 			} else if constexpr (std::is_same_v<T, std::string>) {
                 stream << escape(arg);
@@ -203,9 +206,9 @@ namespace lispy {
 				stream << ")";
 			}
             else if constexpr (std::is_same_v<T, sp_coords>){
-				assert(false);
+				stream << (arg.is_relative ? "$[" : "@[") << arg.x << "," << arg.y << "]";
 			} else if constexpr (std::is_same_v<T, sp_range>){
-				assert(false);
+				stream << (arg.is_relative ? "$[" : "@[") << arg.x << "," << arg.y << "," << arg.width << "," << arg.height << "]";
 			} else if constexpr (std::is_same_v<T, atom>) {
 				for(auto& v : ctx.atoms)
 				{
@@ -235,7 +238,7 @@ namespace lispy {
                 stream << "double";
 			} else if constexpr (std::is_same_v<T, empty>) {
                 stream << "nil";
-			} else if constexpr (std::is_same_v<T, function>) {
+			} else if constexpr (std::is_same_v<T, std::shared_ptr<function>>) {
                 stream << "function";
 			} else if constexpr (std::is_same_v<T, std::string>) {
                 stream << "string";
@@ -319,9 +322,52 @@ namespace lispy {
 		return std::make_pair(lvalue{int64_t(try_d)}, std::string_view{data.begin(), (size_t)(end_f-data.data())});
 	}
 
+	inline std::pair<size_t,sp_coords> get_coords_from_id(const std::string_view id) {
+		size_t x = 0;
+		size_t y = 0;
+		auto c = id.begin();
+		while(*c >= 'A' && *c <= 'Z')
+		{
+			x += *c-'A'+1;
+			x *= 26;
+			c++;
+		}
+		x /= 26;
+		while(*c >= '0' && *c <= '9') 
+		{
+			y += *c-'0';
+			y *= 10;
+			c++;
+		}
+		y /= 10;
+		sp_coords ret;
+		ret.x = x;
+		ret.y = y;
+		return std::make_pair((size_t)(c-id.begin()) ,ret);
+	}
+
 	inline std::pair<lvalue, std::string_view> parse_selector(std::string_view data)
 	{
-		return std::make_pair(lvalue{}, std::string_view{data.begin(), 0});
+		auto it = data.begin();
+		auto is_rel = *it == '$';
+		++it;
+		auto a = get_coords_from_id(std::string_view{it, data.size()-1});
+		a.second.is_relative = is_rel;
+		it += a.first;
+		if(*it == ':')
+		{
+			auto b = get_coords_from_id(std::string_view{++it, data.size()-1});
+			it += b.first;
+			sp_range ret;
+			a.second.is_relative = is_rel;
+			ret.x = a.second.x;
+			ret.y = a.second.y;
+			ret.width = b.second.x;
+			ret.height = b.second.y;
+			return std::make_pair(lvalue{ret}, std::string_view{data.begin(), (size_t)(it - data.begin())});
+		} else {
+			return std::make_pair(lvalue{a.second}, std::string_view{data.begin(), (size_t)(it - data.begin())});
+		}
 	}
 
 	inline size_t find_matching(const std::basic_string_view<token>& data, const size_t idx)
@@ -375,9 +421,9 @@ namespace lispy {
 				using T = std::decay_t<decltype(arg)>;
 				if constexpr (std::is_same_v<T, cons_start>) {
 					auto matching = find_matching(data, idx);
-					auto res = parse(std::basic_string_view<token>{data.begin()+1, matching-idx-1}, ctx);
+					auto res = parse(std::basic_string_view<token>{data.begin()+idx+1, matching-idx-1}, ctx);
 					ret->append(res.second);
-					skip = matching - idx;
+					skip = matching - idx + 1;
 					++sz;
 				} else if constexpr (std::is_same_v<T, cons_end>) {
 					std::cerr << typeid(T).name() << " mismatched parenthesis" << std::endl;
@@ -409,7 +455,7 @@ namespace lispy {
 			} else if(isdigit(*it) || (*it == '-' && isdigit(*(it+1)))) {
 				auto value = parse_number(std::string_view{it, (size_t)(data.end() - it)});
 				ret.push_back(value.first);
-				it += value.second.size()+1;
+				it += value.second.size();
 			} else if(*it == '\"') {
 				auto value = parse_string(std::string_view{it, (size_t)(data.end() - it)});
 				ret.push_back(value.first);
@@ -423,7 +469,7 @@ namespace lispy {
 				++it;
 			} else if (iswspace(*it)) {
 				++it;
-			} else if (*it == '$') {
+			} else if (*it == '$' || *it == '@') {
 				auto value = parse_selector(std::string_view{it, (size_t)(data.end() - it)});
 				ret.push_back(value.first);
 				it += value.second.size()+1;
@@ -437,10 +483,178 @@ namespace lispy {
 		return ret;
 	}
 
+	inline lvalue eval(lvalue& data, context& ctx)
+	{
+		lvalue ret = empty{};
+		std::visit([&](auto& arg) {
+			using T = std::decay_t<decltype(arg)>;
+			if constexpr (std::is_same_v<T, std::shared_ptr<cons>>) {
+				auto it = arg;
+				auto evaluated = std::make_shared<cons>();
+				auto iterated = evaluated;
+
+				do{
+					iterated->self = eval(it->self, ctx);
+					if(it->other)
+					{
+						iterated->other = std::make_shared<cons>();
+						iterated = iterated->other;
+					}
+					it = it->other;
+				} while(it);
+				std::visit([&](auto arg) {
+					using T = std::decay_t<decltype(arg)>;
+					if constexpr (std::is_same_v<T, std::shared_ptr<function>>) {
+						ret = (*arg)(evaluated->other, ctx);
+					} else {
+						ret = evaluated;
+					}
+				}, evaluated->self);
+			} else if constexpr (std::is_same_v<T, atom>) {
+				if(ctx.function_table.count(arg.value))
+				{
+					ret = ctx.function_table[arg.value];
+				} else if (ctx.variable_table.count(arg.value)) {
+					ret = ctx.variable_table[arg.value];
+				} else {
+					ret = arg;
+				}
+			} else {
+				ret = arg;
+			}
+		}, data);
+		return ret;
+	}
+
 	inline lvalue eval(const std::string_view& data, context& ctx)
 	{
 		auto n = lex(data, ctx);
 		auto p = parse(std::basic_string_view<token>(n.data(), n.size()), ctx);
-		return p.second;
+		return eval(p.second, ctx);
+	}
+}
+
+namespace lispy_math {
+
+	int64_t next_as_int(std::shared_ptr<lispy::cons>& arguments, lispy::context& ctx) {
+		int64_t ret = 0;
+		if(!arguments)
+		{
+			std::cerr << "no argument provided, integer expected" << std::endl;
+			if(ctx.error_crash)
+			{
+				std::exit(-1);
+			}
+			return ret;
+		}
+		std::visit([&](auto arg) {
+			using T = std::decay_t<decltype(arg)>;
+			if constexpr (std::is_same_v<T, int64_t>) {
+				ret = arg;
+			} else if constexpr (std::is_same_v<T, double>) {
+				ret = arg;
+			} else {
+				std::cerr << "bad argument provided, integer expected" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+		}, arguments->self);
+		arguments = arguments->other;
+		return ret;
+	}
+
+	namespace integer_functions {
+		class plus : lispy::function {virtual lispy::lvalue operator() (const std::shared_ptr<lispy::cons> arguments, lispy::context& ctx) {
+			auto p = arguments;
+			int64_t a = next_as_int(p, ctx);
+			int64_t b = next_as_int(p, ctx);
+
+			if(p) 
+			{
+				std::cerr << "expected arity of 2 but more arguments provided" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+			return a+b;
+		}};
+		class minus : lispy::function {virtual lispy::lvalue operator() (const std::shared_ptr<lispy::cons> arguments, lispy::context& ctx) {
+			auto p = arguments;
+			int64_t a = next_as_int(p, ctx);
+
+			if(!p) {
+				return -a;
+			}
+
+			int64_t b = next_as_int(p, ctx);
+
+			if(p) 
+			{
+				std::cerr << "expected arity of 1 or 2 but more arguments provided" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+			return a-b;
+		}};
+		class product : lispy::function {virtual lispy::lvalue operator() (const std::shared_ptr<lispy::cons> arguments, lispy::context& ctx) {
+			auto p = arguments;
+			int64_t a = next_as_int(p, ctx);
+			int64_t b = next_as_int(p, ctx);
+
+			if(p) 
+			{
+				std::cerr << "expected arity of 2 but more arguments provided" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+			return a*b;
+		}};
+		class divide : lispy::function {virtual lispy::lvalue operator() (const std::shared_ptr<lispy::cons> arguments, lispy::context& ctx) {
+			auto p = arguments;
+			int64_t a = next_as_int(p, ctx);
+			int64_t b = next_as_int(p, ctx);
+
+			if(p) 
+			{
+				std::cerr << "expected arity of 2 but more arguments provided" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+			return a/b;
+		}};
+		class remainder : lispy::function {virtual lispy::lvalue operator() (const std::shared_ptr<lispy::cons> arguments, lispy::context& ctx) {
+			auto p = arguments;
+			int64_t a = next_as_int(p, ctx);
+			int64_t b = next_as_int(p, ctx);
+
+			if(p) 
+			{
+				std::cerr << "expected arity of 2 but more arguments provided" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+			return a%b;
+		}};
+	};
+		
+	inline void add_integer_functions(lispy::context& ctx) {
+		using func_ptr = std::shared_ptr<lispy::function>;
+
+		ctx.function_table[ctx.get_atom("+")] = func_ptr{(lispy::function*)new integer_functions::plus()};
+		ctx.function_table[ctx.get_atom("-")] = func_ptr{(lispy::function*)new integer_functions::minus()};
+		ctx.function_table[ctx.get_atom("*")] = func_ptr{(lispy::function*)new integer_functions::product()};
+		ctx.function_table[ctx.get_atom("/")] = func_ptr{(lispy::function*)new integer_functions::divide()};
+		ctx.function_table[ctx.get_atom("%")] = func_ptr{(lispy::function*)new integer_functions::remainder()};
 	}
 }
\ No newline at end of file
diff --git a/src/csv-sheet/csv-parse.cpp b/src/csv-sheet/csv-parse.cpp
index 4e11a82..05132a2 100644
--- a/src/csv-sheet/csv-parse.cpp
+++ b/src/csv-sheet/csv-parse.cpp
@@ -3,7 +3,8 @@
 
 int main() {
 	lispy::context ctx;
-	lispy::lvalue v = lispy::eval("cat 13 15.69 \"data \\ ひらがな \n\ttabulated\" \"\" \"test 2 \\x65\"", ctx);
+	lispy_math::add_integer_functions(ctx);
+	lispy::lvalue v = lispy::eval("cat $AA12 @A12:C23 (+ 3 (* 5 6) ) \"data \\ ひらがな \n\ttabulated\" \"\" \"test 2 \\x65\"", ctx);
 	
 	lispy::print_types_visitor(std::cout, v, ctx);
 	std::cout << std::endl;