(1/2)^2+(-2)^2/2^3
(1/2)^2+ [(-2)^2/2^3] =
(1/2)*(1/2) + [(-2)*(-2)/(2*2*2)] =
(1/4) + [ 4 / 8] remember we perform any multiplications/divisions from left to right, frst, before additions/subtractions
(1/4) + 1/2 common denominator
(1/4) + (2/4) =
3/4
