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5x^{2}+20x+15
5(x+2)²-5
-x^{2}+6x-14
...
3x^{2}-18x+27
-x^{2}+2x-4
-3x^{2}-24x-48
-3x^{2}-24x-51
4x^{2}-8x-1
x^{2}-6x+9
5x^{2}-20x+19
5x^{2}+40x+76
-2x^{2}-12x-14
2x^{2}-4x+7
-x^{2}-8x-19
-5x^{2}+10x-5
-2x^{2}+16x-31
-2x^{2}-8x-13
-x^{2}+4x-2
2x^{2}+16x+30
-2x^{2}+12x-23
-2x^{2}-20x-51
4x^{2}+40x+100
4x^{2}+32x+60
-3x^{2}+6x-1
2x^{2}-20x+54