$81m^2-100g^2$
$x^2-5x-144$
$sinx\left(sinx-cosx\right)=0$
$\left|-1+\left(-76+65-\left(-3\right)-4\right)\right|$
$2x^2-14x+7$
$3a^2-9a^2-12a^2+15a^2$
$\log_{5x}\left(625\right)+\log_x\left(\frac{1}{5}-\frac{2}{3}\right)=0$
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