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

/* code_begins */

{{{
var('x,y,z,f1,f2,t')
f1 = y**2-7*y 
u=diff(f1,y,1)
f2(x,y) = 2*x*y+2*x
v=diff(f2,x,1) 
integrate((v-u), (x,0,pi))

/*  Verification of Greens theorem */ 
f1 = y**2-7*y
f3=f1(sin(t))
f2= 2*x*y+2*x
f4=f2(cos(t),sin(t))
x=cos(t)
y=sin(t)
x1=diff(x)
y1=diff(y)
integrate((f3*x1)+(f4*y1),(t,0,2*pi))

code_ends

    *

}}}

/* code_ends */

 * '''Solution by''': 
   * divya , student, pec
   * sneha , student, pec