$20a^212a^28a$
$\int cot\:3x\:\csc^23x\:dx$
$4x+7<-5+6x$
$y+x^2=4y$
$\frac{\frac{sina}{cosa}}{\frac{1}{cosa}}$
$\left(+1\right)+\left(+3\right)+\left(+5\right)+\left(+2\right)+\left(-6\right)$
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