a1=-0,1-1,9*1=-0,1-1,9=-2
a22=-0,1-1,9*22=-0,1-41,8=-41,9
S22=(-2-41,9)/2*22=-43,9*11=-482,9
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a1=-0,1-1,9*1=-0,1-1,9=-2
a22=-0,1-1,9*22=-0,1-41,8=-41,9
S22=(-2-41,9)/2*22=-43,9*11=-482,9