-x*(a^2 + x^2)^(-0.5) + asinh(x/|a|)
_________ 2 / x \ 2 / x \ / 2 2 a *asinh|---| + x *asinh|---| - x*\/ a + x \|a|/ \|a|/ ---------------------------------------------- 2 2 a + x
_________ / 2 2 / x \ -x + \/ a + x *asinh|---| \|a|/ ---------------------------- _________ / 2 2 \/ a + x
/ _________ \ | / 2 2 / x \| -|x - \/ a + x *asinh|---|| \ \|a|// ------------------------------- _________ / 2 2 \/ a + x