$\int\tan^2\left(2y\right)dy$
$2\log\left(100\right)$
$\sin\left(90^{\circ}\right)=\:\frac{1}{\frac{1}{4}}$
$2x^2+2x+4=0$
$4x^2^n-\frac{1}{9}$
$19=4x\:-\:5$
$\lim_{x\to0}\left(\cos\left(x\right)\right)^{\frac{4}{x^2}}$
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