What will come in place of the question mark (?) in the following questions ?
666666 - 565656 + 111111 - 999999 = ?
Expression : 666666 - 565656 + 111111 - 999999 = ?
= (666666 + 111111) - (565656 + 999999)
= 777777 - 1565655
= -787878
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