A^{2} \\
\\
A^{\left(\frac{1}{2}\right)}^{\sqrt{2}} \\
\\
\left(A^{\left(\frac{1}{2}\right)}\right)^{\sqrt{2}} \\
\\
A^{\left(\left(\frac{1}{2}\right)^{\sqrt{2}}\right)} \\
\\
A^{421} + \frac{1}{2} \\
\\
\frac{A^{421}}{2}
