$\frac{d^2}{dx^2}\left(sen\left(x\right)\right)$
$\log\left(x\right)+\log\left(1\right)-8\:\log\left(y+2\right)$
$\frac{8x^3+y^3}{2x+y}$
$-\left(10\cdot100\cdot1000\right)$
$\:2ab+4a,\:a=3,\:b=1$
$\frac{x^4-5x+4}{x+5}$
$\int\frac{t^2}{\left(9+4t^2\right)^2}dt$
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