Respostas

2014-04-06T18:49:32-03:00
53-{13-[6-(4+1)+2]}
53-{13-[6-5+2]}
53-{13-3}
53-10 = 43
*~ Bye

2014-04-06T19:28:51-03:00
53-{13-[6-(4+1)+2]} 
53 - { 13 - [ 6 -5 +2 ] }
53 - { 13 -3}
53 - 10
43