$49x^2+154x+144$
$-5\cdot\left(x+2\right)+5x<5x+10$
$x^2-12x=-20$
$\left(2x-4y\right)^7$
$\frac{4-2x}{x^2-4x^3}$
$-4\cdot\left(9-11\right)$
$x\left(x+3\right)-2\left(x+3\right)=\left[x^2-6\right]$
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