$\frac{x+3}{4}>-2x-6$
$\lim_{x\to\pi}\left(\frac{sen\left(x-\pi\right)}{x-\pi}\right)$
$-4^2+5$
$6d\:-\:12\:-d\:=\:9d+53+d$
$f\left(x\right)=-2x^4+2x^2$
$\left\{5x+11y=26\right\}$
$x\:-7\:<\:4$
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