Select the correct answer from the drop-down menu.
simplify the expression.

4x^5y^3 x (3x^8y^7) over 6x^4t^10
  first what you must do is remove the parentheses
then reduce the expression by canceling the common factors which will give you 2x^5y^3 x 3x^8y^7 over 3x^4y^10. what you must do from here is reduce the expression by cancelling the common factors again which should give you 
2xy^3 x 3x^8y^7 over 3y^10. if you are still following, reduce again same as before and you should get 2x x 3x^8y^7 over 3y^7.
then reduce again and get 2xx^8y^7 over y^7.
then reduce again and you should get 2xx^8.
move the x^8 and you should get 2(x^8x) use the power rule a^m a^n= a^m+n to combine exponents which gives you 2x^8+1. then add 8 and 1 to get 9. and your final answer should be 2x^9

The answer is

128x^9

y^3

Then just do it (lol)