±A2\pm \frac{\mathrm{A}}{2}±2A
±42\pm \frac{4}{\sqrt{2}}±24
±A2\pm \mathrm{A} \sqrt{2}±A2
±32 A\pm \frac{\sqrt{3}}{2} \mathrm{~A}±23 A
±23 A\pm \frac{\sqrt{2}}{3} \mathrm{~A}±32 A