$2x-3\left(x-4\right)$
$5x+3<-x-1$
$\lim_{x\to\frac{\pi}{2}}\left(4x^2-\pi\right)\cdot sec\left(x\right)$
$\frac{2x-x+1}{x}$
$\int\left(10x^3\left(5x^4-1\right)^7\right)dx$
$\lim_{x\to-2}\:\:x^2-4$
$x^3-1311$
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