$\int\left(\frac{1}{4x-1}\right)dx$
$cot\left(x\right)\cdot cos\left(2x\right)=-sin\left(2x\right)+cot\left(x\right)$
$\int\frac{3}{x^4+2x^3+x^2}dx$
$3\tan^2\left(2x\right)-1$
$-4x^2+3x+7x^2-4$
$p^{2\:}+\:11p\:+\:30$
$3x^2+3x+1-4x^2-x-3$
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