2 .3 *4 x5\10 \ ___ 6 .7 .8 \9x1 \ __ / \_ 10x11 +12.13x14*15 +2 *3*1 (_ / / <\ /\ /\ /\ /\ / 4 *5+6 *7 *8*9*1 (__\/ ) < / \ / \ / 10 +11 /12 + 2 *3*4*1 (____)