$\left(\sec\left(x\right)-\csc\left(x\right)\right)\sin\left(x\right)+1$
$\lim_{x\to0}\left(\frac{x^{13}}{x^{14}-x^{13}}\right)$
$z^2+40z+400$
$\int\frac{2x+5}{\left(x+3\right)^3}dx$
$0.01x^2\:+x-600$
$-1455-674$
$3+2\left(-2-3\right)-7\left(1-5\right)$
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