t = 0.25 (slider from -5 to 5, step 0.01)
a = -2.8 (slider from -5 to 5, step 0.1)
b = 0.5 (slider from -5 to 5, step 0.1)
f(x) = (t * (x - a)^(2)) + b
g(x) = 1 / x
h(x) = f(x) + g(x)