Question

How do you insert parentheses to make `18+2*1+3^2 =38` true?

Answer 1

`18+2*(1+3^2)`

Explanation:

`18+2*(1+3^2)=18+2*(1+9)=18+2*10=18+20=38`

The `2*1` multiplication is suspicious, so just play with the parenthesis until the `*1` actually has a meaning.