We are given the following expression

Let us simplify the expression
Recall the order of operations (PEMDAS)
Parenthesis, Exponents, Multiplication & Division, Addition & Subtraction
So first solve the exponents, then division and finally addition

Therefore, the simplified answer is 21.
Similarly, the second expression is given by

First, perform all the operations inside the parenthesis and then division

Therefore, the simplified answer is 5.