$3\cdot5+\left(3-2\right)\cdot7+1$
$4\sqrt{75}+2\sqrt{3}-6\sqrt{27}$
$-4\cdot19$
$3x^2-2x=1$
$\frac{dy}{dx}=\frac{\sqrt{y^2-4}}{2}$
$\sec\left(sec^{-1}\right)$
$b\:2\:+\:8\:\left(b\:2\:-\:8\right)$
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