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Translingual

Symbol

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1. (mathematics) The minus-plus sign

   $\cos(x\pm y)=\cos x\cos y\mp \sin x\sin y\iff {\big (}\cos(x+y)=\cos x\cos y-\sin x\sin y\wedge \cos(x-y)=\cos x\cos y+\sin x\sin y{\big )}$

2. (chess) Advantage for black.

Antonyms

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