$\left(ax+by\right)\left(2by-2a\right)$
$\sin^2\left(x\right)\cdot\cot\left(x\right)\cdot\csc\left(x\right)$
$\frac{x^{2}-5x+4}{x-3}$
$-2x<\frac{1}{2}x+5$
$32a^2-162b^5$
$\left(a+8\right)\left(a-6\right)-\left(2a-7\right)^2$
$-12x^2+27x-14$
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