Maxima latex output



Hi!

I want to create the latex output for an equation. The latex output must be exactly the same as the typed in equation. Take a look at output (%o12) here below, it's modified a bit: -3*x is changed to +(-3)*x. 

I've tried to set the simplification flag to false, but it's not sufficient, some sort of evaluation is still performed. Is it possible to disable this evaluation?

(%i10) simp:false;
(%o10) false
(%i11) tex(13*x+14-12+x-3*x = 2*x -15 +7*x -12,"maximaout.tex");
 (%o11) false
(%i12) 13*x+14-12+x-3*x = 2*x -15 +7*x -12;
(%o12) 13*x+14-12+x+(-3)*x = 2*x-15+7*x-12

- Thanks!

Regards Per