a = -2 (slider from -5 to 5, step 1)
b = 1 (slider from -5 to 5, step 1)
c = 2 (slider from -5 to 5, step 1)
d = 1 (slider from -5 to 5, step 1)
f = Polynomial(a x³ + b x² + c x + d)
h = Polynomial(Derivative[f])
g(x) = 0
T1: "f(x) = " + f
diff = Polynomial(h(x) - g(x))