$x-1<16$
$-72y+16$
$\lim_{x\to\infty}\left(\frac{\sqrt{x+8}-3}{\sqrt{x+3}-2}\right)$
$x^2+12\ge8x$
$7x^3+56$
$-146+409$
$a+b+2c+a-2b+3c$
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