Simplifying
$6x^2-9x+5$
$\int_1^4\ln\left(x-1\right)^1dx$
$a^4-5a^3-6a^2$
$2x-8=30$
$\:\sqrt{\frac{4-x^2}{4x}}$
$\lim_{x\to infinity}\left(\sqrt{9x^2+2x}-3x\right)$
$\frac{x-13}{22}+\frac{x-22}{13}<2$
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