d / 3 \
--\(t + 8*t, y)/
dy
$$\frac{\partial}{\partial y} \left( t^{3} + 8 t, \ y\right)$$
2
d / 3 \
---\(t + 8*t, y)/
2
dy
$$\frac{\partial^{2}}{\partial y^{2}} \left( t^{3} + 8 t, \ y\right)$$
3
d / 3 \
---\(t + 8*t, y)/
3
dy
$$\frac{\partial^{3}}{\partial y^{3}} \left( t^{3} + 8 t, \ y\right)$$