a

b

c = 0 (slider from -5 to 5, step 0.1)
f(x) = ((-(1 / 2)) * x^(2)) + (2 * x) - 1 + c
g(x) = x^(3) - (6 * x^(2)) + (9 * x) - 1 + c
l1 = Solve(f(x) = g(x))
A = Point(xAxis)
B = Point(xAxis)
a: x(A)
b: x(B)
I = IntegralBetween(f, g, a, b)
F: abs(I)
C, D, E = Intersect(g, f)
Text1: "\int\limits_{" + (LaTeX[a]) + "}^{" + (LaTeX[b]) + "}  |f(x) - g(x) | dx  = " + (LaTeX[F]) + ""