f(x) = (-3 * x^(4)) - (4 * x^(3))
l1 = Sequence(f(i), i, -2, 2, 0.5)
T: {{"x", "f(x)"}, {-2, -16}, {-1.5, -1.69}, {-1, 1}, {-0.5, -0.69}, {0, 0}, {0.5, ""}, {1, ""}, {1.5, ""}, {2, ""}}
Text1 = TableText(T, "v|_ll")