Question 771130
{{{(4x^2-3x+9)-(3x^2-7+2x+5)}}}
{{{(4x^2-3x+9)-(3x^2+2x-2)}}}
{{{4x^2-3x+9-3x^2-2x-(-2)}}}
{{{4x^2-3x+9-3x^2-2x+2}}}
not finished
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and what next?
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