a-{b-2a+[3a-2(b+2a)+5b]}
=a-{b-2a+[3a-2b-4a+5b]}
=a-{b-2a-a+3b}
=a-4b+3a
=4a-4b=4(a-b)=4(2003-2011)=4*(-8)=-32