$\lim_{x\to-0.001}\left(\frac{sen2x}{x}\right)$
$\lim_{x\to\infty}\left(1+\frac{\cos\left(x\right)}{x^2}\right)$
$8^{3^x}-\sqrt[3]{2^{9^x}}$
$7x^2-17x+12=0$
$3\:-\:14\::\:7\:-\:5\:.\:4\:-\:9\::\:3\:.\:4$
$w^2+5w$
$\int\cos^25y\sec5ydy$
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