$2x+y;\:x=7;\:y=102$
$\sqrt{5+2x}\cdot\sqrt{5+2x}$
$4\sin^2\left(x\right)\cos^2\left(x\right)=\sin^2\left(2x\right)$
$\left(cot\:x+1\right)\left(\sqrt{3}cot\:x-1\right)=0$
$\frac{0n\lg}{12^{\circ}}$
$\int\left(xe^x\right)\sin\left(x\right)dx$
$\int a\arctan\left(a\right)da$
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