diff --git a/include/rigid_paradise/lispy/lispy.hpp b/include/rigid_paradise/lispy/lispy.hpp
index e9059b5..bddf0cd 100644
--- a/include/rigid_paradise/lispy/lispy.hpp
+++ b/include/rigid_paradise/lispy/lispy.hpp
@@ -42,6 +42,7 @@ namespace lispy {
 		std::unordered_map<std::string, int> atoms;
 		int last_atom = 0;
 		bool error_crash = false;
+		bool print_parse_results = false;
 		std::unordered_map<int, std::shared_ptr<function>> function_table;
 		std::unordered_map<int, lvalue> variable_table;
 
@@ -423,7 +424,7 @@ namespace lispy {
 					auto matching = find_matching(data, idx);
 					auto res = parse(std::basic_string_view<token>{data.begin()+idx+1, matching-idx-1}, ctx);
 					ret->append(res.second);
-					skip = matching - idx + 1;
+					skip = matching - idx;
 					++sz;
 				} else if constexpr (std::is_same_v<T, cons_end>) {
 					std::cerr << typeid(T).name() << " mismatched parenthesis" << std::endl;
@@ -530,6 +531,13 @@ namespace lispy {
 	{
 		auto n = lex(data, ctx);
 		auto p = parse(std::basic_string_view<token>(n.data(), n.size()), ctx);
+		if(ctx.print_parse_results)
+		{
+			print_types_visitor(std::cerr, p.second, ctx);
+			std::cerr << std::endl;
+			print_visitor(std::cerr, p.second, ctx);
+			std::cerr << std::endl;
+		}
 		return eval(p.second, ctx);
 	}
 }
@@ -540,7 +548,7 @@ namespace lispy_math {
 		int64_t ret = 0;
 		if(!arguments)
 		{
-			std::cerr << "no argument provided, integer expected" << std::endl;
+			std::cerr << "no argument provided, number expected" << std::endl;
 			if(ctx.error_crash)
 			{
 				std::exit(-1);
@@ -554,7 +562,36 @@ namespace lispy_math {
 			} else if constexpr (std::is_same_v<T, double>) {
 				ret = arg;
 			} else {
-				std::cerr << "bad argument provided, integer expected" << std::endl;
+				std::cerr << "bad argument provided, number expected" << std::endl;
+				if(ctx.error_crash)
+				{
+					std::exit(-1);
+				}
+			}
+		}, arguments->self);
+		arguments = arguments->other;
+		return ret;
+	}
+
+	double next_as_floating(std::shared_ptr<lispy::cons>& arguments, lispy::context& ctx) {
+		double ret = 0;
+		if(!arguments)
+		{
+			std::cerr << "no argument provided, number 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, number expected" << std::endl;
 				if(ctx.error_crash)
 				{
 					std::exit(-1);
@@ -647,6 +684,74 @@ namespace lispy_math {
 			return a%b;
 		}};
 	};
+
+	namespace float_functions {
+		class plus : lispy::function {virtual lispy::lvalue operator() (const std::shared_ptr<lispy::cons> arguments, lispy::context& ctx) {
+			auto p = arguments;
+			double a = next_as_floating(p, ctx);
+			double b = next_as_floating(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;
+			double a = next_as_floating(p, ctx);
+
+			if(!p) {
+				return -a;
+			}
+
+			double b = next_as_floating(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;
+			double a = next_as_floating(p, ctx);
+			double b = next_as_floating(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;
+			double a = next_as_floating(p, ctx);
+			double b = next_as_floating(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>;
@@ -657,4 +762,13 @@ namespace lispy_math {
 		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()};
 	}
+		
+	inline void add_floatingp_functions(lispy::context& ctx) {
+		using func_ptr = std::shared_ptr<lispy::function>;
+
+		ctx.function_table[ctx.get_atom("+.")] = func_ptr{(lispy::function*)new float_functions::plus()};
+		ctx.function_table[ctx.get_atom("-.")] = func_ptr{(lispy::function*)new float_functions::minus()};
+		ctx.function_table[ctx.get_atom("*.")] = func_ptr{(lispy::function*)new float_functions::product()};
+		ctx.function_table[ctx.get_atom("/.")] = func_ptr{(lispy::function*)new float_functions::divide()};
+	}
 }
\ No newline at end of file
diff --git a/src/csv-sheet/csv-parse.cpp b/src/csv-sheet/csv-parse.cpp
index 05132a2..3eb1067 100644
--- a/src/csv-sheet/csv-parse.cpp
+++ b/src/csv-sheet/csv-parse.cpp
@@ -3,8 +3,10 @@
 
 int main() {
 	lispy::context ctx;
+	ctx.print_parse_results = true;
 	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_math::add_floatingp_functions(ctx);
+	lispy::lvalue v = lispy::eval("cat $AA12 @A12:C23 (/. (+ 3 (* 5 6)) 10) \"data \\ ひらがな \n\ttabulated\" \"\" \"test 2 \\x65\"", ctx);
 	
 	lispy::print_types_visitor(std::cout, v, ctx);
 	std::cout << std::endl;