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