sorry this is the right pic

[IMG]http://i35.tinypic.com/v8mn86.png[/IMG]

AS you see I change the order of the brachet but its still givin me an error

> f:=(x^((1/(3)))*y^((2/(3)))(x)+x)*diff(x)+(x^((2/(3)))*y^((1/(3)))(x); +y(x)*diff(y(x))=0;

Error, invalid input: diff expects 2 or more arguments, but received 1