$16a^2-24a^2+6a-1$
$-220+250-200+330+170+140-160$
$8a^3b^3\:2a-b$
$x^{2}-17-60$
$-7x+15\le-5x+1$
$-sec\left(x\right)=\frac{1-sec\left(x\right)}{1-cos\left(x\right)}$
$-399<x$
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