$\left(49g+19n\right)^2$
$\csc\left(\frac{\pi}{4}\right)+\tan\left(\frac{\pi}{3}\right)-\sec\left(\frac{\pi}{6}\right)$
$x^2-3x=350$
$900-1z^2$
$\left(2h+\frac{1}{2}\right)^{2}$
$-2\left(-4g^2-g-2\right)$
$-8-2+4r-2-9r+9-2$
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