$-10\csc\left(x\right)+20=0$
$x^2-7x+18$
$\log\left(3x^4\right)$
$tanx\:=-\frac{15}{49}\:$
$\left(x-4\right)\left(x+4\right)-x^2+16$
$\left(-24\right)\:-\:\left(-23\right)$
$\frac{d}{dx}y=\left(\frac{3}{x}\right)^{14}$
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