a = 1 (slider from -5 to 5, step 0.1)
b = -3 (slider from -5 to 5, step 0.1)
c = 2 (slider from -5 to 5, step 0.1)
f(x) = (a * x^(2)) + (b * x) + c
texto1 = LaTeX(f, true, true)