Question 568397
{{{(4y^2-5y)+(3y-7y^2)-(2y^2+6y-5)}}} Start with the given expression.



{{{4y^2-5y+3y-7y^2-2y^2-6y+5}}} Distribute



{{{(4y^2-7y^2-2y^2)+(-5y+3y-6y)+5}}} Group like terms



{{{-5y^2-8y+5}}} Combine like terms



So {{{(4y^2-5y)+(3y-7y^2)-(2y^2+6y-5)}}} simplifies to {{{-5y^2-8y+5}}} 



In other words, {{{(4y^2-5y)+(3y-7y^2)-(2y^2+6y-5)=-5y^2-8y+5}}} for all values of y.

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