$a^6-b^2\:x^8$
$\int\frac{\left(x^2+16x+63\right)}{\left(x^2-2x-63\right)}dx$
$5\sqrt{2}.\:4\sqrt{2}$
$\frac{\left(\left(sinx+cosx\right)^2-1\right)}{cos^2x}=2tanx$
$5x-7\left(x+1\right)>-9$
$\frac{3u}{u-1}+1$
$3.1-1.9832$
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