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

/* code_begins */

{{{
y=var('y')
x=var('x')
plot3d((-5)/(1+x**2+y**2),(x,-3,3),(y,-3,3))

}}}

/* code_ends */

 * '''Solution by''': 
   *<N.V.S Saikrishna>, <student>, <Prakasam engineering College>
   *<M.Pavan kumar>, <student>, <Prakasam engineering College>
   *<T.Raghavendra>, <student>, <Prakasam engineering College>
   *<B.Raghavendra>, <student>, <Prakasam engineering College>
   *<Y.Siva kumar Reddy>, <student>, <Prakasam engineering College>
   *<J.lakshmi narayana>, <student>, <Prakasam engineering College>