math 2X^2+3X+1 d^2+8d+7 2a^2+5a+3 3x^2-x-4 2n^2+n-6 x^2+5x-14 5x^2-2x-7 7n^2+9n+2 3x^2+8x+4 7a^2-30a+8
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