$\frac{2\frac{1}{2}+3}{\sqrt[2]{1-2\frac{1}{2}}}$
$\frac{1}{sec^2\left(a\right)}=sen^2\left(a\right).\cos^2\left(a\right).\cos4\left(a\right)$
$\left(1+y\right)^3$
$\left(x-30\right)\cdot\left(10\cdot\left(y-x\right)\right)+\left(y-40\right)\cdot\left(1000+10x-20y\right)$
$\frac{d}{dx}\sqrt{\frac{x^3-1}{x^3+1}}$
$\left(x^a-y^b+z^c\:\right)^2$
$\frac{4x}{2x}^2-\frac{121}{11}$
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