$\lim_{x\to-\infty}\frac{4-x}{x+\sqrt[3]{1-x^3}}$
$-657-854-83-1284-3568$
$7sec\left(x\right)csc\left(x\right)=14csc\left(x\right)$
$\frac{15x^4y^{-2}}{3x^2y^3}$
$\lim_{x\to0}\left(\sqrt{x^2+3x}-\sqrt{x^2-2x}\right)$
$11x+11x+4x^4+4x^4$
$8x+3\le\:14x+6$
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