а) $$2(5 - 2x) + 14x - 8 = 10 - 4x + 14x - 8 = 10x + 2$$.
б) $$-5(a - 7) - 36 = -5a + 35 - 36 = -5a - 1$$.
в) $$-3x - 6 + 4(2x - 5) = -3x - 6 + 8x - 20 = 5x - 26$$.
г) $$-7a - 3(a - 2) = -7a - 3a + 6 = -10a + 6$$.