$\sqrt{\left(-5\right)^2}-4\left(12\right)\left(8\right)$
$9\left(4y^2-12y+9\right)$
$\frac{4^2-121}{2n+11}$
$5^1+\:5^1$
$\frac{1}{2}\left(12x+6x-21\right)$
$\frac{30.888}{15.600}$
$\left(x+1\right)^2\cdot4-5x$
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