$sin^2\theta\:\:csc\theta\:\:sec\theta\:$
$-\left|26\right|$
$x^2-30x+225=0$
$x^2-3x-2$
$\frac{x}{x+y}\ge0.8$
$0=14\sin\left(x\right)+14sin\left(x\right)cos\left(x\right)$
$\lim_{x\to+\infty}-5-x^3$
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