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2014-04-16T14:31:32+03:00
{[(a/2:4)+5]*4-16}:2+15=35
{[(a/2:4)+5]*4-16}:2=35-15=20
[(a/2:4)+5]*4-16=20*2=40
[(a/2:4)+5]*4=40+16=56
(a/2:4)+5=56:4=14
(a/2:4)=14-5
a/2:4=9
a/2=9*4=36
a/2=36
a=72