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