$\left(4x+5\right)+\left(2x-10\right)+\left(3x+20\right)$
$\left(39a^2-36b^2-45ay\right)\left(40ab^2\right)$
$29+n=13$
$\left(g-3\right)\left(g-1\right)$
$8-140-3+1$
$-\frac{200}{100}$
$-3\pi-2.0888$
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