问题

>> :mode
Calculating mode: fraction

>> 7x^2+x-0.48
in> 7x^2+x-0.48

out> (-25*7*x^2+25*x-12)|25
------------------------

>>

>> +x^5-0.5
in> +x^5-0.5

out> (-2*x^5-1)|2
------------------------

>> +x^1.3-0.5
in> +x^1.3-0.5

out> (2*x^(13-10))|2*10)
------------------------