5x^2 y^3 = -7
x^2 y^3 = -7/5 = -1.4
(x^2 y^3)^2 = x^4 y^6 = (-7/5)^2 = 1.96
1) -10 * (-7/5) = 14
2) 5*1.96 = 9.8
