Why does it show “invalid syntax”?

Question

Please, help, what is wrong with it??
https://code.sololearn.com/cpgQSoiZOn7b/?ref=app

Answer 1

What is this?

BMI(body mass index) = weight / height**2

why 'body mass index' there?

Answer 2

Well the variable name BMI(body mass index) is incorrect name.

Answer 3

Ohhh yeah I got it😅😅😅

Answer 4

Silly me 🤦🏼‍♀️😂😂😂