$cos^2\left(2\right)-sen^2\left(2\right)=1$
$\left|\left(2x+5y^2\right)^2-\left(x^3-2y\right)^2\right|$
$4-8-\left(-4\right)$
$x-2<10$
$a\:-3b\:-8c\:+4b\:-a\:+8c$
$\int_0^{\infty}\left(\frac{-11\cdot\cos\left(x\right)}{-20x}\right)dx$
$\left(\frac{27x^{-5}y^5}{18x^{-6}y^2}\right).\left(\frac{x^4y^{-2}}{x^{-2}y^3}\right)$
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