$\int\frac{\left(7x+21\right)}{\left(x^2-5x-6\right)}dx$
$\frac{2x-6}{2}$
$2x-\frac{3y}{2}\:;x=-4;y=2$
$4.2+1.9$
$\int\frac{x}{\left(x^2+a^2\right)^2}dx$
$4m^2+7m-2$
$x^3-4x^2+2x+x$
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