document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=710057>Question 710057</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The  operation © is defined by a © b = a^2 – b^2.  What is (2013 © 2012) © (2012 © 2011)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #436877 by </B><A HREF=/tutors/aboutme.mpl?userid=sachi><B>sachi(548)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sachi><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=sachi><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=436877\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  a © b = a^2 – b^2=(a+b)(a-b)<BR>\n" );
document.write( "(2013 © 2012) © (2012 © 2011)=[(2013+2012)(2013-2012)]©[(2012+2011)(2012-2011)]<BR>\n" );
document.write( "=[4025]©[4023]=(4025+4023)(4025-4023)=8048*2=16096 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );