$y^2+\frac{4}{3}y$
$\frac{\sin\left(x\right)}{1+\cos\left(x\right)}+\frac{1+\:\cos\left(x\right)}{\sin\left(x\right)}=2\csc\left(x\right)$
$f'\left(x\right)=x+\left(\frac{1}{2}\right)sen\left(2x\right)$
$9abc-12a^2c+18ab^2$
$\frac{1}{\sqrt{a}-2}$
$\left(3wy+3zy\right)$
$-\frac{40}{10}$
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