| 1. |
[(6x + 10) - (17x + 10)] + [10x (4x + 2)]
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| 2. |
[(5x + 3) (8x + 6)] × [(-9x + 10) (12x2 + 5x - 5)]
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| 3. |
[(15x2 + 8x + 19) + (12x2 + 5x + 18)] × [(2x + 6) (9x + 4)]
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| 4. |
[(-5) (-11x + 6)] × [(11x2 + 16x + 9) + (14x2 + 8x + 12)]
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| 5. |
[(20x2 - 17x + 8) - (-7x2 + 17x + 8)] + [(-8x + 1) (-4x)]
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| 6. |
[(-2x + 8) (12x2 - 4x - 6)] × [(10x2 + 9x + 11) + (-17x2 - 15x + 12) + (10x2 - 10x - 8)]
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| 7. |
[(-18x6 - 15x4 + 10x) - (17x6 + 16x2 + 17x)] × [(-2x) (3x + 4)]
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| 8. |
[(-4x - 3) (9x - 7)] + [(-10x5 + 16x4 + 4x3) + (-4x6 + 15x5 + 11x3)]
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| 9. |
[x (3x2 - 8x + 4)] × [(-10x + 10) (10x - 9)]
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| 10. |
[(-18x2 + 5x + 11) - (-15x2 + 7x - 4)] × [(12x5 - 2x4 - 8x2) (-6x + 6) (-2x2 + 12x + 6)]
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| 11. |
[(8x6 - 8x5 - 14x3 - 20) - (-9x7 + 9x4 + 12x2 + 16x + 18)] + [(3x6 + 6x5 - 11x4) (-9x + 5) (2x + 8)]
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| 12. |
[(-8x) (10x + 11)] × [(-11x2 + 6x - 6) + (5x2 + 16x - 10)]
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| 13. |
[(12x + 14) (12x - 10)] - [(-18x2 + 10x - 18) - (5x2 + 9x - 13)]
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| 14. |
[(4x + 11) (12x - 11)] + [(-8x2 - 8x - 9) + (-8x2 - 7x + 6)]
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| 15. |
[-11x (11x2 + 10x + 11)] × [(11x + 14) (13x - 16)]
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| 16. |
[(-11x7 - 18x6 + 10x2 - 11) - (-20x7 - 11x6 - 18x)] × [(-18x7 - 6x6 + 20) + (4x7 - 15x6 - 11x3)]
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| 17. |
[(8) (5x2 + 7x + 6)] + [(-17x + 13) (19x + 9)]
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| 18. |
[(-11x) (2x + 4)] - [(-10x6 + 14x3 - 7x2) - (6x5 - 19x + 8)]
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| 19. |
[(4x - 9) (3x2)] × [(6x - 19) (-14x + 9)]
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| 20. |
[(6x7 + 9x6 - 16x3 - 10) + (-14x6 + 7x4)] × [(5x - 5) (-2x3 + 12x2 - 7x + 3)]
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