$\log_{10}\left(y+2\right)=\log\left(y\right)+\log\left(1\right)$
$menos\:5\:por\:menos\:1$
$\left(4-2y\right)^2$
$2x^3+6x^2-x-5$
$\lim_{x\to0}\left(\frac{ln\left(sen\left(5x\right)\right)}{ln\left(sen\left(2x\right)\right)}\right)$
$5xy^7-y$
$\left(x+5\right)^2+\left(y+3\right)^2=16$
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