t = -2.5 (slider from -2.5 to 2.5, step 0.1)
B = Intersect(xAxis, yAxis)
C = (0.5, 0.5)
A = Intersect(yAxis, (0, 1))
c = Circle(B, C, A)
g = Line(A, xAxis)
f(x) = 1 / (x^(2) + 1)
M: (t, 1)
h = Segment(B, M)
D, E = Intersect(c, h)
M2: (x(M), y(E))
i = Segment(M, M2)
j = Segment(M2, E)
t1, m2, e, m = Polygon(E, M, M2)