$7+3r<4$
$13\tan\left(x\right)=0$
$\sin\left(3x\right)\cdot csc\left(x\right)+\cos\left(2x\right)$
$c^2+13c-14$
$-3\left(-1\right)^2-21\left(-1\right)-30$
$\frac{x^3-4x^2+5x-8}{x-2}$
$\left(3x^{\left(2\right)}-4\right)\left(3x^{\left(2\right)}+2\right)$
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