$( x ^ { 2 } + x - 2 ) ( - x + 3 )$
$dy-2xydx=0$
$\left(2x^2+5\right)\left(x-4\right)=0$
$5x^2+40+8$
$\int sen6x\:cos2x\:dx$
$12ab-9ab+15ab+6ab-3ab-8ab$
$\left(2x^3+5x\right)^2$
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