$\left(4x+5y\right)^2\quad$
$\left(x-\frac{1}{2}\right)\left(x+5\right)$
$3x+5\cdot4$
$\left(2xy-z\right)^2$
$x^3+6x^2+12x+8$
$\lim_{x\to\infty}\left(\frac{3x+2}{3x-1}\right)^2$
$6+-7\left(-8\right)+4-2$
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