diff --git a/lib/ruby_algebra/parser.rb b/lib/ruby_algebra/parser.rb
index 05c8086..77e4b8b 100644
--- a/lib/ruby_algebra/parser.rb
+++ b/lib/ruby_algebra/parser.rb
@@ -116,7 +116,6 @@ module RubyAlgebra
         elsif c == " "
           i += 1
         else
-          puts "Unrecognized character at pos #{i}"
           i += 1
         end
       end
@@ -127,7 +126,6 @@ module RubyAlgebra
       operators = []
       out_stack = []
       tokenize(expr) do |token|
-        pp token
         if token.type == :num
           out_stack.push(Constant.new(token.value))
         elsif token.type == :end
@@ -166,9 +164,6 @@ module RubyAlgebra
       b = out_stack.pop if oper.type == :op
       a = out_stack.pop
 
-      puts "make unary op #{oper.op} from (#{a})" if oper.type == :unary_op
-      puts "make binary op #{oper.op} from (#{a}), (#{b})" if oper.type == :op
-
       case oper.op
       when :add
         out_stack.push Addition.new(a, b)