$\:21\:+\:1-2$
$\frac{1}{3}^2.\frac{1}{3}^x$
$2^{10.482}\cdot0.7$
$\int sec\left(x\right)tan\left(x\right)\cdot tan\left(x\right)dx$
$\sqrt{10}\cdot cosx=3$
$3x^2-14x-15$
$3^{m-1}+3^m-12=0$
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