a = 0 (slider from -5 to 5, step 0.1)
h = 3 (slider from -5 to 10, step 0.1)
k = 5 (slider from 0 to 10, step 0.1)
d: y = (a * (x - h)^(2)) + k
text1: "y=" + (LaTeX[a]) + "(x-" + (LaTeX[h]) + ")^2+" + (LaTeX[k]) + ""