t = -0.5 (slider from -5 to 5)
f(x) = ((2 * x) + t) / x^(2)
A = Intersect(f, xAxis, (0.25, 0))
k = 4 (slider from 0 to 5)
gl1: x = (-0.5 * t) + k
a = Integral(f, x(A), k - (0.5 * t))