Vamos là.

a) c*(d + e) + x*(y + z)

b) y*(w - z) + m*(x - z)

c) a*(10b + c) + d*(10b + c) = (10b + c*(a + d)

Explicação passo-a-passo:

[tex] \blue{{a)cd + ce + xy + xz}} \\ \blue{ cd + ce + xy + xz} \\ \blue{cd + ec + xy + xz} \\ \red{resposta} \\ \pink{cd + ec + xy + xz} \\ \\ \blue{b)wy - yz + my - mz} \\ \blue{wy - yz + mx - mz} \\ \red{resposta} \\ \pink{wy - yz + mx - mz} \\ \\ \blue{d)10ab + ac + 10bd + cd }\\ \blue{10ab + ac + 10bd + cd} \\ \blue{a \times (10b + c) + 10bd + cd} \\ \blue{10ab + ac + 10bd + cd} \\ \blue{ a \times (10b + c) + d \times (10b + c)}\\ \blue{(10b + c) \times (a + d)} \\ \red{resposta} \\ \pink{ (10b + c) \times (a + d)}\\ \red{ espero \: ter \: te \: ajudado} \\ [/tex]