f_1(x) = (6 + ℯ^(cos(x / 5))) / (1 - ℯ^(cos(x / 5)))
k_{1} = -0.5 (slider from -5 to 5)
g_1(x) = ((10 * k_{1}) * π) - (5 * acosd(ln(((-((-x) + 6))) / (x + 1))))
f_2(x) = (ℯ^((8 * x / 7)) - 2) / (ℯ^((8 * x / 7)) + 4)