(-2/3 x^3 y)×(-9/10 x^(-5) y^(-1) )

Question

(-2/3 x^3 y)×(-9/10 x^(-5) y^(-1) )

Answer 1

... = (2*9/3*10)* x^(3-5) * y^(1-1) = (3/5)* x^(-2) * y^0 = 3/(5*x^2)