Помогите пожалуйста, решить досконально, упрашиваю))

1) а) a(b + c) + p(b + c) = (a + p)(b + c)

б) a(x - y) - b(x - y) = (a - b)(x - y)

в) 3a(a + b) - m(a + b) = (3a - m)(a + b)

г) 7(x - c) + (x - c)xc = (7 + xc)(x - c)

2) а) a(x - 2) + 1 * (x - 2) = (a + 1)(x - 2)

б) 1 * (c + 8) - c(c + 8) = (1 - c)(c + 8)

3) а) 2(a - 3) + b(3 - a) = 2(a - 3) - b(a - 3) = (2 - b)(a - 3)

б) 3(b -  5) - a(5 - b) = 3(b - 5) + a(b - 5) = (3 + a)(b - 5)

4) а) x(a - 5) + (5 - a) = x(a - 5) - (a - 5) = (x - 1)(a - 5)

б) m - n + (n - m)y = 1 * (m - n) - y(m - n) = (1 - y)(m - n)