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HAHAh Gawin niyo pong b yung x salamat :)

b-6b+8...b is multiplied by it self,,and 2 is multiplied by 4..=b -_ +8

then to get the middle...2 multiplied by b and 4 is multiplied by b,,= -2b -4b= - 6b....so the answer is b - 6b + 8