The mpower(A,x) command returns the matrix power $A^x$.

The mpower(x,A) command returns the power $x^A$.

$\mathrm{with}\left(\mathrm{MTM}\right)\:$

$A≔\mathrm{Matrix}\left(\left[\left[1\,2\right]\,\left[3\,4\right]\right]\right)\:$

$x≔3\:$

$\mathrm{mpower}\left(A\,x\right)$

$\left[\begin{array}{cc}37& 54\\ 81& 118\end{array}\right]$

$B≔\mathrm{Matrix}\left(\left[\left[1\,2\right]\,\left[2\,1\right]\right]\right)\:$

$x≔3\:$

$\mathrm{mpower}\left(x\,B\right)$

$\left[\begin{array}{cc}\frac{41}{3}& \frac{40}{3}\\ \frac{40}{3}& \frac{41}{3}\end{array}\right]$

$\mathrm{LinearAlgebra}:-\mathrm{MatrixExponential}\left(\ln \left(x\right)B\right)$

$\left[\begin{array}{cc}\frac{41}{3}& \frac{40}{3}\\ \frac{40}{3}& \frac{41}{3}\end{array}\right]$