$\tan^2\left(x\right)\sin\left(x\right)=\tan^2\left(x\right)$
$\frac{2^2+4^2}{\frac{4^2}{82}}42+\frac{4}{2}$
$-6\cdot12-13$
$81-16x^2$
$2tg^2x+sec^2-2=0$
$\int\frac{x}{\left(x+3\right)\left(x+1\right)^2}dx$
$m^2+10m+16$
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