(%i1) load(odelin)$
(%i2) odelin(-('diff(f,x,2))*x^2+(f*x)/(-1)^m+('diff(f,x,1))*x-f,f,x);
Maxima encountered a Lisp error:
Error in EVENP [or a callee]: $M is not of type INTEGER.
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.
