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[(a-416:4+2)x5+3]x2=1986
a:2+(123x3-53x4)=257


Răspuns :

[(a-416:4+2)x5+3]x2=1986
[(a-14+2)x8]x2=1986
[(a-16)x8]x2=1986
[(a-128]x2=1986
[(a-256]=1986
1986-256
a=1730