$x^2-4+4$
$\int\frac{t}{\sqrt[3]{\left(x^2+9\right)}}dt$
$\int\frac{2x-5}{x^{2}-5x-24}dx$
$\int\frac{x^2-2x+2}{\left(x+2\right)\left(x-3\right)}dx$
$-3a^2b,\:para\:a=2\:y\:b=5$
$\left(a-7\right)\left(a+4\right)$
$\frac{ds}{dr}+7s=rs^7$
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