$34-23-89$
$3y+6+2y-3-6y^2+7y^2-4$
$24=2x+x^2$
$\lim_{x\to-1}\left(\frac{x^2-3x-4}{x^2+2x+1}\right)$
$\frac{\sqrt{1+\sqrt{x}}}{\sqrt{x}}$
$\left(18-x^2\right)\left(x-2\right)$
$\sec x\csc x\cot x$
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