plot 5 sqrt(231/2) e^(-(48*5*sqrt(231/2)|g|)^(1/4)) dg/dx substitute g=0.070491 (sqrt(1+arctanh(x)^2)^4 arctanh(x))/(sqrt(1+arctanh(0.5)^2)^4 arctanh(0.5)) from x=-1..1 y=0..2.5