Find the sum and product of identity function and the modulus function.

Explanation

We know that,identity function is f(x)=x, modulus function is `f(x)=∣x∣`

sum `=x+∣x∣`

that is equal to
`2x if x>0` and `0 if x<0`

And,

product of them is `x*∣x∣`

that is equal to `x^2 if x>0` and `−x^2 if x<0`