$2+2\cdot4$
$7x^2=112$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{sinx}{cosx}-\frac{1}{1-sinx}\right)$
$\frac{2\tan\left(x\right)}{1+tan^2\left(x\right)}=sen\left(2x\right)$
$+347+299+999$
$\left(10\sqrt[2]{5}\right)^2$
$-6sinx=-3\sqrt{2}$
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