Evaluation of Definite Integral

[salvomic]

hi,
you can avoid to use EVAL() and CAS.int: simply input the integral via the template via shift-C key...
otherwise control better how to input via EVAL() using Catalog to input int() and use X (upper, D key, and not lowercase), don't input "by hand", because it could be a little (still not well documented) bug in the present version of FW that produce "d1" or something instead of dx, when there are spaces, I think.
With Template (or EVAL() and int() via Catalog) you get the correct answer.
If still there is error, purge the X variable.

Salvo