reorganise renders

pymath/calculus/expression.py

@@ -7,26 +7,13 @@
 from .generic import Stack, flatten_list, expand_list, isNumber, isOperator, isNumerand
 from .str2tokens import str2tokens
 from .operator import op
-from .explicable import Explicable
+from .explicable import Explicable, Explicable_int
 
 from .random_expression import RdExpression
 
 __all__ = ['Expression']
 
 
-class Explicable_int(int, Explicable):
-    isNumber = True
-
-    def __init__(self, val):
-        super(Explicable_int, self).__init__(val)
-        self._val = val
-        self.postfix_tokens = [self]
-        self.steps = []
-
-    def simplify(self):
-        return Explicable_int(self._val)
-
-
 class Expression(Explicable):
     """A calculus expression. Today it can andle only expression with numbers later it will be able to manipulate unknown"""