About Maxima and MS-DOS



Hello,
I'm looking for some technical informations about MS-DOS comands with Maxima. I've tried the following one which doesn't work :

env MAXIMA_USERDIR=bin\maxima --batch="maxima_1.in" > maxima_1.out & jobs -l > maxima_1.pid


maxima_1.in  is a file with a simple comand like
integrate(2/x^3;x);


I want to have a file with the answer written in a single line :
-1/x^2

Can you help me because I do not find any documentation about MS-DOS comands for Maxima ? This will help me to do some simple PhP scripts which could use Maxima.


Best regards.
BAL Christophe.