QUES:
Who is it in the following sentence?

A mathematical equation is more influential than politics, because it will stand forever.

ANS:
A mathematical equation

QUES:
Who is him in the following sentence?

Rocky beat Drago because the crowd was not supporting him.

ANS:
Drago

QUES:
Who is they in the following sentence?

Walmart is promoting their Black Friday sale heavily in commercials because they want to start off the Christmas season successfully in sales.

ANS:
Walmart