d
--((3*acos(t) - acos(3*t), y))
dy
$$\frac{\partial}{\partial y} \left( 3 \operatorname{acos}{\left(t \right)} - \operatorname{acos}{\left(3 t \right)}, \ y\right)$$
2
d
---((3*acos(t) - acos(3*t), y))
2
dy
$$\frac{\partial^{2}}{\partial y^{2}} \left( 3 \operatorname{acos}{\left(t \right)} - \operatorname{acos}{\left(3 t \right)}, \ y\right)$$
3
d
---((3*acos(t) - acos(3*t), y))
3
dy
$$\frac{\partial^{3}}{\partial y^{3}} \left( 3 \operatorname{acos}{\left(t \right)} - \operatorname{acos}{\left(3 t \right)}, \ y\right)$$