Hi,

    I implemented a Delta() function as a part of my project of
implementation of Kauers' algorithm

    It takes as input function expression and returns the difference
between final value(function's expression  incremented to 1) and
initial value (function's expression)
.
    I saved the changes and ran it from sympy at python IDLE as
follows

>>>Delta(x**2 + 2*x + 1)
 2*x + 3

But when I wrote the tests as

assert Delta(x**2 + 2*x + 1) == 2*x + 3

it printed assertion error

The tests diden't passed. I don't know what's the differenece between
the two situations, please help me figure it out

-Saurabh Jha

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