How do I plot the integral of a function in matlab?

For a class assignment I need to show in matlab that I can find the antidirivitive and dirivitive of a function. I am able to find and show those new functions using a sysms command, but what I can't figure out is putting those new functions into graphs.

Here is the code I have below:

The first graph works, but the other graphs give me errors: "Undefined function 'int' for input arguments of type 'double'. Help would be gratefully appreciated!