$$\log{\left (\operatorname{acos}{\left (4 \right )} \right )} \operatorname{acos}^{x}{\left (4 \right )}$$
x 2
acos (4)*log (acos(4))
$$\log^{2}{\left (\operatorname{acos}{\left (4 \right )} \right )} \operatorname{acos}^{x}{\left (4 \right )}$$
x 3
acos (4)*log (acos(4))
$$\log^{3}{\left (\operatorname{acos}{\left (4 \right )} \right )} \operatorname{acos}^{x}{\left (4 \right )}$$