$\log\left(x\right)=-0.469$
$\int\frac{\tan\sqrt{x}}{\sqrt{x}}\:dx$
$tgx\left(1+cosx^2\right)$
$10^9-1$
$\frac{\left(2\sin\left(x\right)\cdot\cos\left(x\right)+1\right)}{\sin\left(x\right)\cdot\cos\left(x\right)+\cos\left(x\right)}$
$4z^2-36z+81$
$5-2x>3x$
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