Expand and simplify each of the following expressions:(a) (6x + 2) (4x + 3) (b) (3x - 2) (x + 5) (c) (x -1)(x + 2) (d) (2x - 3)(x + 2)(e) (6x - 2)(2x + 8) (f) (2 - x) (x + 4)