Order of Operations

$\frac{1}{2}$ + $\frac{1}{2}$ = 1 + ( $\frac{70}{2}$ ) = 35 = 36 + 1 = 37

Or because the fractions have a common denominator you can add

1+1+70+2= 74 and 74 divided by 2 = 37

$\dfrac{1}{2} + \dfrac{1}{2} + \dfrac{70}{2} + 1 \blue{\implies} \dfrac{1 + 1 + 70 + 2}{2} \blue{\implies} \boxed{37}$

This is an example of mental math.

Simplify the fractions to get 1 + 35 + 1 which yields 37.