I don't know Maple, but the ancestral MACSYMA prints powers and rationals in a 2-d format like that. In maxima that is controlled by a global variable, DISPLAY2D, which is set TRUE by default. Setting that false gives output on a single line, which would be much easier to parse or translate in Perl.

Maple probably has a similar flag, check your docs.

Added: Here's bit of a maxima session to demonstrate,

(%i99) display2d;
(%o99)                       TRUE
(%i100) x^2+3*x^3;
                              3    2
(%o100)                    3 x  + x
(%i101) display2d:false;
(%o101) FALSE
(%i102) %o100;
(%o102) 3*x^3+x^2
(%i103)
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