Question

A) m-(x-p+m)
B) (a+b)-(a-b)

Answer 1

а) = m -x +  p - m = p - x
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b) = a + b -a + b = 2b

Answer 2

m-(x-p+m) = m-x+p-m = -x+p

(a+b)-(a-b)= a+b-a+b = 2b