$\sin\left(x\right)\cdot\csc\left(\frac{\pi}{2}-x\right)$
$6x^2-3x+5$
$2x^2-6x-8=0$
$2\sqrt[3]{a^2}.3\sqrt{b^2a}.4\sqrt[4]{ab}$
$\frac{dy}{dx}=\frac{x^2+x}{\sin\left(2y\right)}$
$7^x+7^{x+1}+7^{x+2}=2793$
$7x-11<2x+160$
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