$\frac{1-sin^2\left(-x\right)}{1+cot^2\left(-x\right)}$
$\left(-\frac{5}{4}-\frac{2}{9}\right)^2$
$27,431\:+\:48,573\:+\:81,129$
$\left(\tan\:\left(y\right)+\sin\:\left(y\right)\right)\left(\tan\:\left(y\right)-\sin\:\left(y\right)\right)$
$\lim_{x\to1}\left(\frac{x-1}{x^3+4x-1}\right)$
$13-12-\left(-11\right)$
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