Simplify $\left(\left(15^{4.14}\right)^{9.3}\right)^2$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $9.3$ and $n$ equals $2$

Simplify $\left(15^{4.14}\right)^{18.6}$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $4.14$ and $n$ equals $18.6$

Simplify $\left(\left(21^{6.35}\right)^{3.8}\right)^3$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $3.8$ and $n$ equals $3$

Simplify $\left(21^{6.35}\right)^{11.4}$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $6.35$ and $n$ equals $11.4$