(215 - 42) - 215= ?, -42, 27, 13, 11, (-4233) - (14 - 4233) =?, -14, 23, -19, 14, 513 + [ 187 - (287 + 113) ] =?, 300, 125, -300, 23, (-624) - [(376 + 245) - 45]=?, -1200, 300, -65, 1200.

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