$3^{\left(x-1\right)\left(x+2\right)}=81$
$9\int tg^2\left(x\right)\cdot sec\left(x\right)dx$
$\left(\frac{3}{2}m+5a\right)\left(\frac{3}{2}m-5a\right)$
$\left(4a-3\right)\left(6a+1\right)$
$\tan\left(23\right)+\tan\left(22\right)+\tan\left(23\right)\cdot\tan\left(22\right)$
$\int\frac{8}{4x^2+1}dx$
$\ln\frac{y}{x^2+1}=1$
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