SimplifiedWithoutTheImaginaryUnit​(AngouriMath.​Entity,​AngouriMath.​Entity)

A candidate's integrand in its variable simplified one level, or as it is written where
that would bring in the imaginary unit which neither it nor integrand holds. The one level writes sqrt(-u) as i sqrt(u), the other root wherever
u is negative, and a candidate is negative on the whole line as often as not:
tanh(x)^2 - 1 is, and sqrt(a + b sech(x)) tanh(x)^3 under it was
sqrt(a + i b sqrt(u)), where the root written as it was is answered by the
search in u. https://github.com/asc-community/AngouriMath/issues/1370