$\log_x\left(2015\right)=y$
$3\log\left(w\right)\:+\log\left(x\right)\:-\frac{1}{2}\log\left(z+1\right)$
$4x^3-77x^2+972x$
$5-\sqrt{25}$
$x^2+5x+15=0$
$-4\cdot\left(1+7\right)$
$\frac{x+1}{x-3}+3\ge0$
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