u2−2gh\sqrt{u^{2}-2 g h}u2−2gh
2gu2−2gh\frac{2}{g} \sqrt{u^{2}-2 g h}g2u2−2gh
g2u2−2gh\frac{g}{2} \sqrt{u^{2}-2 g h}2gu2−2gh
gu2−2ghg \sqrt{u^{2}-2 g h}gu2−2gh