$\left(8x+4y^2\right)\left(8x-4y^2\right)$
$y^2-3y+9$
$\left(3x\right)^2\left(x\right)$
$\frac{1+sin2a+cos2a}{sina\:+\:cosa}=2cosa$
$\left(9x+4\right)\left(81x^2-36x+16\right)$
$-x^3+x^2+48$
$\left(x^2-6x+1\right)$
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