$cos\left(x\right)=\:\frac{5}{14}$
$\frac{1+sen\:\left(x\right)}{sen\:\left(x\right)}=1+cos\:\left(x\right)$
$x^2+9x-18$
$5\left(2\right)^2\left(3\right)$
$20,817-39,906$
$e^{3.682}$
$\int_2^4\sqrt{1+4x^2}dx$
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