derivation of a exponential function - python

Question

I'm still new at this and I am trying to code a derivative calculator using python but when I try to differentiate exponential functions, the answer is not correct. Here is my code.

from __future__ import division
from sympy import *

x,t = symbols('x t')

Enter equation of i: ')
equation=input(' ')
print(diff(equation,x))

Answer 1

See this code. It is working very well.

Input: x*x
Output: 2*x

https://code.sololearn.com/cn0aB7ILHTNK/?ref=app

Answer 2

Try this function.

diff(exp(x**2), x)

Read more about sympy here
https://docs.sympy.org/latest/tutorial/calculus.html