$\lim\:_{x\to\:\infty\:}\left(\frac{log\left(x+1\right)}{sen\left(x\right)}\right)$
$\left(8xy^3\right)^2$
$14-4\left(x-12\right)<4+x$
$\lim_{x\to3}\left(\frac{6x^2+5x-4}{2x-1}\right)$
$2x\:-\:5\:<\:9$
$2\left(1-x\right)-2\left(x+2\right)<7$
$\frac{d^4}{dx^4}\left(x^4-2x^3-5x+2\right)$
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