In a peculiar mathematical operation plus means multiplication, minus means plus, divided means minus and multiplications means sum of digits of two numbers. Follow these rules and solve the following example. (6 × 7) – (8 × 9) – (10 × 11) = ?

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In a peculiar mathematical operation plus means multiplication, minus means plus, divided means minus and multiplications means sum of digits of two numbers. Follow these rules and solve the following example. (6 × 7) – (8 × 9) – (10 × 11) = ?

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