f(x) = x^(3) - (3 * x^(2)) + 3
A = (-2, 0)
B = (1, 0)
a = Line(A, B)
C = Point(a)
D = Point(a)
g(x) = 20
b = Integral(g, -100, x(C))
c = Integral((-g(x)), -100, x(C))
d = Integral(g, x(D), 100)
e = Integral((-g(x)), x(D), 100)