Fix: move __call__ to expressions

mapytex/calculus/API/tokens/polynomial.py

@@ -11,7 +11,6 @@ Tokens representing polynomials functions
 
 """
 from ..expression import Expression
-from functools import partial
 from .token import Token
 from ...core.MO import MO
 from ...core.MO.atoms import moify
@@ -93,14 +92,7 @@ class Polynomial(Token):
         12 + 5
         17
         """
-        tree = self._mo.tree
-        variable = (set(tree.get_leafs(extract_variable)) - {None}).pop()
-
-        dest = moify(value)
-        replace_var = partial(replace, origin=variable, dest=dest)
-        tree = tree.map_on_leaf(replace_var)
-
-        return Expression(tree).simplify()
+        return Expression(self._mo.tree)(value)
     
     def differentiate(self):
         """ Differentiate a polynome
@@ -262,25 +254,6 @@ class Quadratic(Polynomial):
         else:
             raise NotImplementedError("Todo!")
 
-
-
-def extract_variable(leaf):
-    try:
-        return leaf.variable
-    except AttributeError:
-        return None
-
-def replace(leaf, origin, dest):
-    """ Recursively replace origin to dest in leaf """
-    try:
-        leaf.tree
-    except AttributeError:
-        if leaf == origin:
-            return dest
-        return leaf
-
-    replace_var = partial(replace, origin=origin, dest=dest)
-    return leaf.tree.map_on_leaf(replace_var)
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