$\int sen\left(2\right)\cdot\cos\left(4x\right)dx$
$\lim_{x\to0}\left(\left(\frac{\ln\left(x^2+x\right)}{2+\ln\left(x\right)}\right)\right)$
$4+2x<5-4x$
$y^2+3x=0$
$-7-12-\left(-19\right)$
$\lim_{n\to\infty}\left(\frac{2^n+\sqrt{3}}{4^n}\right)$
$f\left(x\right)=4x^2+2x-6$
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