How to replace approximate real numbers near zero in expression with exact integer 0?

Sometimes we have very small coefficients in symbolic operations.

syms x y

y = sin(pi)*x; 

The result is

y =(4967757600021511*x)/40564819207303340847894502572032

How to replace approximate real numbers near zero in expression with exact integer 0?

Answer 1

[Mark Sherstan]

Refer to the post here. It refers to your exact question.

[lei jiang]

Thank you.

Answer 2

[Walter Roberson]

syms x y
Pi = sym('pi')
y = sin(Pi)*x;