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

/* code_begins */

{{{
var('z')
f=function('f',z)
f=z**2+3*z;f
f(3*I+1)
var('u,v,x,y')
u=function('u',x,y)
u=x**2-y**2+3*x;u
v=function('v',x,y)
v=2*x*y+3*y;v
u(1,3)
v(1,3)
}}}

/* code_ends */

 * '''Solution by''': 
   * <sarada>, <student>, <prakasam>
   * <ananthalakshmi>, <student>, <prakasam>