$\:f\left(x\right)\:=\sqrt{\frac{x^2+4x+4}{x^2-4}}$
$\left(8x+6\right)\left(8x-6\right)$
$-2cos^2x+sinx+5=4$
$9a^4+81a^2b^2+729b^4$
$1.62\:+1.67+1.60+1.20+1.00+1.48$
$\int\frac{x}{\sqrt{9-\left(2x+1\right)^2}}dx$
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