$\:2^2-234+4^2$
$\int\left(x\cdot\left(\sqrt{a^2-x^2}\right)\right)dx$
$s^2+13s+22$
$3+\frac{sen^2}{cos^2}=5$
$\frac{\left(-2\right)^4.3^5.\left(-2\right)^8}{\left(-2\right)^7.3^3}$
$\:\frac{1\:+cos\:w}{sen\:w}$
$\frac{4b^{-3}}{5a^{-5}}$
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