I wonder why 1+1-1*h isn't simplified to 2-h. Nevertheless, the fact that wxmaxima displays it as 1+1+-1*h seems to be a wxmaxima bug.
Update asdf with corresponding changes from maxima.system.
Fix a comment. There are no long any cycles
Rename sumprod.lisp to sumprod-core.lisp
Forgot to add new file sumprod.lisp
Break the cycle between asum and combin
Break cycle between asum and mdot
Add comment to special-functions-misc and expression-utils