Решите неравенство:
1) (х + 5)(х - 5) - (х+3)х ≤ х + 1;
2) (у + 4)(4 - у) + (у + 5)у > 6у - 20;
3) (х+2)(х -6) - (х - 7)(х + 7) < 30 - 3х;
4) (3х +2)²  - (4 -3х)² ≤ 14 + 37х;
5) (х - 1)³ - (х +1)³ ≤  х - 6х²;
6) (7 -х)(х + 7) - 3х (х +2) < 2(1 - х) - 5х - 4х²
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