(x/2-y)/2 (3x+1)/2 m/2-n/2 x/2-9 (5-x)(5+x) (7-y)(7+y) Решите прошу!

Question

(x/2-y)/2
(3x+1)/2
m/2-n/2
x/2-9
(5-x)(5+x)
(7-y)(7+y)
Решите прошу!

Answer 1

X/4-y/2
3x/2+1/2
(m-n)/2
(x-18)/2
25-x²
49-y²