$x^{4}-2x^{2}-8$
$2\left(3f\right)$
$\sec\left(x\right)=\frac{2\sqrt{3}}{3}$
$\left(t\right)\left(t+3\right)\left(t+2\right)$
$20a^2+23a-7$
$6\left(z+5\right)$
$\left(x+2\right)\frac{dx}{dy}=x+8$
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