$-\left(\left(2x+5\right)\cdot\left(3x-4\right)\right)$
$x^2-2x+1=\left(x+1\right)^2$
$-p^2+9$
$-5a+2a$
$3\left(j+7\right)$
$\lim_{x\to1}\left(8x^2+2x-1\right)$
$\sin\left(x\right)^2=\frac{\tan\left(x\right)^2}{1+\tan\left(x\right)^2}$
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