$\frac{\sec^2\left(x\right)\cdot\cot\left(x\right)}{\csc^2\left(x\right)}=\tan\left(x\right)$
$\sec x+2=0$
$x^2-22x-71+192$
$\frac{dy}{dx}=x\left(e^{x^2}+2\right)$
$\left(7x^2+7\right)\left(7x^2-7\right)$
$5x\left(0\right)$
$\frac{2x^2+x-21}{2-\sqrt[5]{3x^2+5}}$
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