$sin\left(x+t\right)-sin\left(x-y\right)$
$\lim_{x\to0}\left(\frac{1}{x}\right)^{\sqrt{x}}$
$2x-3x-3+4^2+10+x$
$-38d^2e^6f+25d^2e^6f$
$cot\:a\:+tan\:a\:$
$\int_{-\sqrt{3}}^{\sqrt{3}}\left(\frac{x^2}{x^2-1}\right)dx$
$-\left(x-3\right)\left(x+4\right)$
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