Question 604842
-8x^3y(-7x^5y^4)


(-8*(-7))(x^3y*x^5y^4)


56x^3y*x^5y^4


56(x^3*x^5)*(y*y^4)


56(x^3*x^5)*(y^1*y^4)


56(x^(3+5))*(y^(1+4))


56x^8y^5



So the answer is *[Tex \LARGE 56x^8y^5]