$\cos\frac{\pi}{3}\cos\frac{\pi}{6}+\sin\frac{\pi}{3}\sin\frac{\pi}{6}$
$22x-12y+3y-7x$
$\int_0^te^{ux}\:dx$
$-2\left(-7+8\right)^2$
$\int11x\:e^{x\:}dx$
$7+x-x$
$\lim_{x\to\infty}\left(4^{\frac{x+2}{x+1}}\right)$
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