Question 140918
(3x^2-5x^3-x)-2(x^3-3x+4)
3x^2-5x^3-x-2x^3+6x-8
-7x^3+3x^2+5x-8
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3x -5
7x -5
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21x^2-35x-15x+25
21x^2-50x+25