$\left(65\right)\left(-3\right)$
$x\left(x+3\right)=5x+4$
$\frac{dy}{dx}\:y=3\left(cotx+cscx\right)\left(cotx-cscx\right)$
$3x^2-2+1$
$\sec^2\left(x\right)+\csc^2\left(x\right)-2=2\cot^2\left(x\right)$
$\frac{2x+6}{3x}=x-8$
$p^{2\:}+\:40\:-\:12$
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