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[" 8.Simplify "2x-[3y-{2x-(y-x)}]],[" Si...

[" 8.Simplify "2x-[3y-{2x-(y-x)}]],[" Simplify the expression "2(a^(2)+ab)+3-ab" and find its value when "a=5" and "b=-3],[" 0.From the sum of "6+4y+y^(2)" and "8-5y+3y^(2)" subtract the sum of "6y^(2)-4y" and "-y^(2)+4y+9" ."]

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