$y=\ln\left(4x^2+2\right)$
$240=2\left(3w-40\right)+2w$
$10\left(x+\frac{1}{x}\right)^9$
$-\left(+5\right)-11-\left(-13+6\right)$
$\left(1.4\right)\left(3.2\right)$
$\frac{1}{cos\:a}=\frac{\cos a}{1-sin^2a}$
$\int_{0}^{\frac{x^{2}-16}{4}}\frac{1}{\sqrt{2+x^{2}}}dx$
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