$\tan^2x\sin^2x$
$12\sin^2x-11\sin x+2=0$
$5-9+6-14+7-20$
$4sin\:x+4=2$
$\lim_{x\to-2}\ln\left(6x^2+2\right)$
$708\cdot10^6$
$\int\left(x^3\sqrt{x^4+7}\right)dx$
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