$\left(x+3+m\right)^2$
$\left(2u^{\frac{1}{2}}\right)^8$
$x^{9\:}-\:x^8+3x^7-x^6\::\:\left(-2x^4\right)$
$5+11-5-2-9+8+6+8-4-3-8+5+6+5-7$
$\cot^2\cdot\csc^2=\cos^4$
$\left(2x^2+5y+\frac{2}{3}\right)^2$
$x^2+2x+1-x^2-2x+1$
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