$\ln\left(4x+13\right)=\ln\left(3x+7\right)$
$8.76:3$
$\left[\left(+4\right)-\left(-7\right)\right]-\left(-2\right)$
$4x=7.1$
$x^2+2x+35$
$x^2\left(2x+9\right)$
$\left(a-b\right)\left(a^2+b^2+a+b\right)$
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