$9-61+1^2$
$\left(\frac{1}{4}x+\frac{3}{5}\right)\left(\frac{2}{5}x\frac{3}{4}\right)$
$\arcsin\left(x\right)+\arccos\left(x\right)+\arcsin\left(\sin\left(x\right)\right)$
$9\left(6\right)\cdot9^{-4}\cdot9^{-2}$
$4-4x+4^2$
$\left(x^n-2y^n\right)^2$
$\frac{z^2z^4}{z^3z^{-1}}$
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