a) m(7(m-n)+(m-n)) = m(8m-8n) = 8m²-8mn
b) p(6(p-q)+(q-p)) = p(6p-6q+q-p) = p(5p-5q) = 5p²-5pq
c) a(11(a+b)-(a+b)) = a(10a+10b) = 10a²+10ab
d) c(4(r-s)-(s-r)) = c(3r-3s) = 3cr-3cs
e) 3x(5y-z)-(15y-3z) = 15xy-3xz-15y+3z = 15xy-15y-3z+3z = 15xy-15y
f) r(8(6s+7t)-(28t+24s)) = r(48s+56t-28t-24s) = r(24s+28t) = 24rs+28rt
g) (2m+n)²-2m-n = (2m+n-2m-n)(2m+n+2m+n) = (-n)(4m) = -4m
h) 5x-3y-(3y-5x)² = 5x-3y-(9y²-30xy+25x²) = -9y²+30xy+20x
i) 7p+2q+(2q+7p)² = 7p+2q+(4q²+28pq+49p²) = 4q²+35pq+56p²
a) m(7(m-n)+(m-n)) = m(8m-8n) = 8m²-8mn
b) p(6(p-q)+(q-p)) = p(6p-6q+q-p) = p(5p-5q) = 5p²-5pq
c) a(11(a+b)-(a+b)) = a(10a+10b) = 10a²+10ab
d) c(4(r-s)-(s-r)) = c(3r-3s) = 3cr-3cs
e) 3x(5y-z)-(15y-3z) = 15xy-3xz-15y+3z = 15xy-15y-3z+3z = 15xy-15y
f) r(8(6s+7t)-(28t+24s)) = r(48s+56t-28t-24s) = r(24s+28t) = 24rs+28rt
g) (2m+n)²-2m-n = (2m+n-2m-n)(2m+n+2m+n) = (-n)(4m) = -4m
h) 5x-3y-(3y-5x)² = 5x-3y-(9y²-30xy+25x²) = -9y²+30xy+20x
i) 7p+2q+(2q+7p)² = 7p+2q+(4q²+28pq+49p²) = 4q²+35pq+56p²