f(x) = x^(2.0)
k = 3 (slider from 0 to 5, step 0.1)
g(x) = (x / k)^(2.0)
a = -1.4 (slider from -5 to 5, step 0.1)
c = 3 (slider from -5 to 5, step 0.1)
d = Integral(g, k * a, k * c)
b = Integral(f, a, c)