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9000-[(147×15+98×63)-1344:56]●-●


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Salut!

9000-[(147×15+98×63)-1344÷56] =

9000-[(2205+98×63)-1344÷56] =

9000-(2205+6174-1344÷56) =

9000-(2205+6174-24) =

9000-(8379-24) =

9000-8355 =

645