f(x) =

f(x) = x^(3) - (2 * x)
P = Point(f)
x0: x(P)
y0: f(x0)
gL: -7
f1(x) = f'(x)
m0: f'(x0)
t0: ((-x0) * m0) + y0
Y: (0 | t0)
Eingabefeld1 = Textfield(f)
x1: (y0 * (1 - 1 / m0))
X: (x1 | 0)
t(x) = (m0 * (x - x0)) + y0