$-x\le-58$
$\frac{x^3+6x+7}{x}$
$\int\sin\left(x+\pi\right)dx$
$\lim_{x\to\infty}\left(\sqrt{x^2-2bx+a}-\sqrt{x^2-2cx+d}\right)$
$\left(a+5x\right)^7$
$xy+y=x^2y^2$
$9xy+6x^2y-4xy-2xz+3x^2y$
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