How can I plot a plane in a 3D space by using symbolic functions?

i have a 3D function like T(x,y,z) that is symbolic. then i should use ezfunctions to plot it. i want to define a plane in the 3D domain of my function to display the rates of my function on it. i'm new to matlab if you want to answer my question please explain. an example image that i want to create like that, is available in attached files

thanks

[José-Luis]

No attached files.

[Kate Crawford]

Try this....

syms x y z

f(x,y,z) = something

fimplicit3(f)