- 12√√2+1\frac{1}{2}\sqrt {\sqrt 2 + 1}
- √2(√2+1)\sqrt {2\left( {\sqrt 2 + 1} \right)}
- √2+1\sqrt 2 + 1
- 12√2(√2+1)\frac{1}{2}\sqrt {2\left( {\sqrt 2 + 1} \right)}