fe.settings:getUserBoardSettings - non array given[rus] - Endchan Magrathea
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No. 26548 [Open] [Reply]
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 >>/26537/
aa+bb=2*2
c=a+b
d=a-b
S=cc+dd=
(a+b)(a+b)+(a-b)(a-b)=
aa+2ab+bb+aa-2ab+bb=
2aa+2bb=
2(aa+bb)=
2*4=
8