Simplify the Algebra problems..?? Plz help and thnks?

Question

1) (-3x^5y^2z)(5xy^7z^11)=

2) 4x(2x-5) - 3x(x+2)=

3) 10a^5b^7c/15a^2b^7c^8=

Answer 1

first two you distrubute and then you .....sry thats all i can do lol not good in math

Answer 2

1) (-3x^5 y^2 z)(5x y^7 z^11) = -15x^6 y^9 z^12

2) 4x(2x - 5) - 3x(x + 2) = 8x^2 - 20x - 3x^2 - 6x = 5x^2 - 26x

3) 10a^5 b^7 c / 15a^2 b^7 c^8 = 2a^3 / 3c^-7