Need math help with multiplying binomials and polynomials

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Need math help with multiplying binomials and polynomials

1- Multiply the following binomials.

(6a+2)(3a−4)

2- Multiply the following binomials.

(1−4b)(2+5b)

3- Multiply the following polynomials.

(y+2)(y^2+5y+3)

4- Multiply the following polynomials.

(6b−2)(b^2−3b+4)

5- Multiply (x^2+3)(5x^2−2) 

6- Simplify 6x(x−3)+8

7- Multiply the following by applying the distributive property.

a^2(2a^2+5a+9)

8- Simplify 3(a−4)+a(a+6)

9- Simplify y(y+5)−9