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

/* code_begins */

{{{
x=var('x')
y=function('y',x)
DE=diff(y,x,2)+y
desolve(DE,y)
}}}

/* code_ends */

 * '''Solution by''': 
   * <umesh>, <student>, <Ait,pune>
   * <nitish>, <student>, <Ait ,pune>