$\left(4m^{2\:}+3x^2\right)^2$
$14x^2-21x+6x-9$
$y=\frac{e^{x^3}\sqrt{x^7-x}}{x^2+2x+1}$
$sec^2\theta\:-1$
$8x^2+2x+3=0$
$\left[\left(5\right)\left(6\right)\right]^3$
$\left(b^{2x}+3\right)\left(b^{2x}-3\right)$
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