How to write code for chain rule partial differential equation?

How to write code for chain rule partial differential equation

[madhan ravi]

learn about diff()

Answer 1

[KSSV]

syms u v x(u,v) y(u,v) z(x,y) 
z = exp(x*y) ;
x = 2*u+v ;
y = u/v ; 
dz_du = diff(z,u)

[mazin alseadi]

Please , How to model this operation by Simulink ?