a) (x + 3)(y+4)= xy + 4x + 3y + 12
b) (m + 6)(n-2) = mn - 2m + 6n - 12
c) (a - 7)(b - 3) = ab - 3a - 7b +21
d) (2 + x)(3 + 2y) = 6 + 4y + 3x + 2xy
e) (5m + 1)(3 - n) = 15m - 5mn + 3 - n
f) (5 - 2p)(3q - 2) = 15q - 10 - 6qp + 4p
g) (2a - 3)(3b - 4) = 6ab - 8a - 9b + 12
