$\lim\:_{x\to\:0}\left(\frac{arctan\left(sin\right)\left(3x\right)}{arcsin\left(2tanx\right)}\right)$
$\int\left(2x\cdot e^{\left(2x^2-1\right)}\right)dx$
$\left(\sqrt{6}-\sqrt{2}\right)\left(\sqrt{a}+\sqrt{b}\right)=4$
$3x-2y+z=8$
$\frac{15}{3}+4.2+3.4$
$3\sin^2z=4\cos^2z$
$\left(9x+7x^5-4x^2-14x^4-2\right):\left(x-2\right)$
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