$4x^2+28x+45=0$
$\left(30y-12x^2y+9y\right)$
$3\cot^3x-9\cot^2x-30\cot x$
$\frac{z^{2p-3}}{z^{4-p}}$
$\lim_{x\to0}\left(\frac{x^2-1}{\sqrt{x^2-3}-1}\right)$
$34ax^2+51ay-68ay^2$
$- 310 + 245 - 138 + 657 - ( - 183 ) . e 1$
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