Not so sure about this! Is it wrong so say

(-1/3)ln|1-3y| = -1/x + c

e^(-1/3)ln|1-3y| = e^(-(1/x)+c)

(-1/3)(1-3y) = Ae^-1/x

Do I always have to bring the 1/3 to the front like ln|1-3y|^1/3 before removing the e??

btw how do you get the pi symbol above the toolbar for using lateX (dy/dx) etc?