I am trying to find the solution (\Psi) as f approaches zero. However, after applying the limit the solution becomes zero. See the attached .mw file.limit.mw

How to simplify the product of 4x4 matrices and how can we take out the expression that appears in each entry of the matrix?

MLM-1.mw

How to find sgn on maple?

signum.mw

How to evaluate the integration when ?

integration_24sep.mw

xE.mw

I integrate the expression maple but the result is large. How to furtherxE.mw reduce the size of the result? Also, what is dilog on maple?