Problem:
Find the jacobian of the vector valued function $\begin{pmatrix} f(x,y,z)\\ g(x,y,z) \\ h(x,y,z)\end{pmatrix}$ where $f(x,y,z) = y z$, $g(x,y,z) = \tan (y)$, and $h(x,y,z) = z^3$
from sympy import *
from sympy.abc import x, y, z

f = y*z
g = tan(y)
h = z**3
X = Matrix([f, g, h]) 
print(X.jacobian((x, y, z)))
