q.py

   1 from sympy import *
   2
   3 x = Symbol("x")
   4 y = Symbol("y")
   5 z = Symbol("z")
   6 a = Symbol("x")
   7
   8 #print Add((x, y, z))
   9
  10 #e = Integer(1) + Integer(2)
  11 #print e
  12
  13 #print hash(x*y) == hash(y*x)
  14 #print (x*y) == (y*x)
  15 #print (x*y).args
  16 #print (y*x).args
  17 e = x*y-y*x
  18 e = x+y-x
  19 print e