Помогите плизз срочно нужно №5.100(3,4,7,8,9) и №5.101(5,6,7,8,9) помогите срочно

3) (p+q)3=(p+q)(p2+2pq+q2)
4) (p-q)3=(p-q)(p2+2pq+q2)
7) (x-2)3=(x-2)(x2+4x+4)
8) (4+x)3=(4+x)(16+8x+x2)
9) (a+2b)3=(a+2b)(a2+4ab+b2)

5)(0.2x-5y)3=(0.2x-5y)(0.04x+2xy+25y)
6)(3a-0.6b)3=(3a-0.6b)(9a+3.6ab+0.36b)
7)(0.1m-4n)3=(0.1m-4n)(0.01m+0.8mn+16n)
8)(0.5a+0.16)3=(0.5a+0.16)(0.25a+0.16a+0.0256)