my = -0.53 (slider from -5 to 5)
sigma = 0.136 (slider from -5 to 5)
f(x) = (1 / (((x * sigma) * sqrt((2 * pi)))) * ℯ^((-((ln(x) - my)^(2) / ((2 * sigma^(2)))))))
f'(x) = f'(x)
f''(x) = f''(x)