Question 720853
{{{(3x^3 + 9x^2-2x)-(7x^3 -6x^2 + 1)}}}


{{{3x^3 + 9x^2-2x -7x^3 + 6x^2 -1}}}


{{{(3x^3-7x^3)+ (9x^2 + 6x^2)-2x - 1}}}


{{{ -4x^3+15x^2-2x -1}}}