$\frac{\sec\left(x\right)+\tan\left(x\right)}{1}=\frac{\cos\left(x\right)}{1-\sin\left(x\right)}$
$-1+14-18+30-5-9-12$
$\frac{2x^{-2}y^{-2}}{4y^{-5}}$
$\left(3b-b\right)\left(3b-5\right)$
$7x+30\ge-8$
$\lim_{x\to2}\left(\frac{x^3+x^2+2x}{x^2-x-6}\right)$
$\left(dx\right)^2+\left(dy\right)^2=0$
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