$\left(5x^5y^6\right)\left(9x^2\right)$
$14x-7x^2$
$\left(-3+\frac{5i}{n}\right)^2$
$\frac{\cos^2\left(x\right)-5\sin^2\left(x\right)}{1-6\sin^2\left(x\right)}$
$\left(5m+7\right)\left(5m-7\right)$
$2\sin^2x+4\sin x+2=0$
$\left(m^6-4\right)\left(m^6+4\right)$
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