Simplify: (2x^4y^5) (-7xy^3) 2

First step is to do the square power on the second parenthesis.

(49x^2y^6)

Now multiply by first parenthesis.

(2x^4y^5) (49x^2y^6)

2*49 = 98

x^4 * x^2 = x^6 (add powers)

y^5 * y^6 = y^11 (add powers)

Put it all back together.

98x^6y^11

The answer is 129. It was really easy