Kontrollkästchen

a_2 = false
b = -5 (slider from -5 to 5, step 0.1)
f(x) = (x - b)^(2.0)
a = -4.1 (slider from -5 to 5, step 0.1)
c = -3.2 (slider from -5 to 5, step 0.1)
g(x) = (x - a)^(2.0)
l(x) = (x - c)^(2.0)