$\cos\left(x\right)\csc\left(x\right)\tan\left(x\right)+\sin\left(x\right)\sec\left(x\right)\tan\left(x\right)$
$\frac{\left(-3\right)^{2}\cdot\left(-3\right)^{5}}{\left(\left(-3\right)^{2}\right)^{3}}$
$-8x=11x$
$24ab+30ac-18ad$
$5x-4y=-1$
$\lim_{x\to1}\:x+3$
$\lim_{x\to0}\left(\frac{3x+5}{2x+1}\right)$
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