Evaluate
-\frac{2\sqrt{2}\left(2x_{0}+2y_{0}+1\right)}{\left(1-2x_{0}\right)\left(2|x_{0}-y_{0}+1|-5\right)}
Differentiate w.r.t. x_0
\frac{4\sqrt{2}\left(-4x_{0}y_{0}sign(x_{0}-y_{0}+1)-4sign(x_{0}-y_{0}+1)x_{0}^{2}+2y_{0}sign(x_{0}-y_{0}+1)-4y_{0}|x_{0}-y_{0}+1|+sign(x_{0}-y_{0}+1)-4|x_{0}-y_{0}+1|+10y_{0}+10\right)}{\left(\left(1-2x_{0}\right)\left(2|x_{0}-y_{0}+1|-5\right)\right)^{2}}
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