$\frac{b^0}{b\cdot b}$
$-9x^4+7x^2+5;\:x=1$
$2+\tan^2x+\sec^2x=2$
$\lim\:_{x\to\:1}\sqrt{\frac{x^3-1}{x-1}}$
$7\sqrt{3}\:-\:12\sqrt{3}\:+\:2\:\sqrt{3}$
$\left(wa+6x^2\right)\left(wa-6x^2\right)$
$-\:4;\:y=\:2\:$
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