f(x) = x^(3) - x
C = Intersect(f, xAxis, 1)
g(x) = (3 * x)
F, G, H = Intersect(f, g)
A1 = IntegralBetween(f, g, -2, 0)
A2 = IntegralBetween(g, f, 0, 2)
V1divperPI = Integral((g(x) - 6)^(2) - (f(x) - 6)^(2), -2, 0)
V2divperPI = Integral((f(x) - 6)^(2) - (g(x) - 6)^(2), 0, 2)
AToltal: A1 + A2
VTotaldivperPI: V1divperPI + V2divperPI