$\frac{\frac{v}{5}}{\frac{1}{0}}$
$12-4\cdot\left(\frac{15}{5}-5\right)^2-\left(12-5\cdot4\right)$
$2x+9+7y-5+3x+y$
$0=2x^2-16x-18$
$8\left(7-2x\right)-6\left(3x-4\right)$
$x^2+y^2+x=0$
$4x^2-16x-3$
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