||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
x = var('x')
y = function('y',x)
deq1 = diff(y,x,3)+3*diff(y,x,2)+3*diff(y,x)+y-30*e**(-x)==0
soln = desolve_laplace(deq1 ,  [y,x] , ics=[3,-3,-47])
soln
}}}

/* code_ends */

 * '''Solution by''': 
      * V Krishna Harsha, Student ,ASR College Of Engineering