$\left(5x^2+7\right)+\left(6x-2\right)$
$6x^2+7+12$
$\left(26+20y\right)^2$
$\frac{5\ln\left(5x\right)}{3+4x}$
$\left(2x+5\right)\left(2x+6\right)$
$\cos x+\cos y=1$
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