You are right, my solution is wrong. I was not able to get to the original SDE using ITO.Who can help me out?

Hello ,I have to express this SDE in terms of S:dSt=mu*dt+s*StdWtmu and s are constants, Wt~N(0,1). dSt some stockpriceprocess.I guess the solution is St=mu*t+exp(-s^2*t*1/2+sWt).Is this correct?Thank You