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1. ; t ¹ - 4 , 4
2. ; t ¹
3. ; x ¹ - , 0 , 3
4. ; x ¹ - 4 , 0 , 4
5. ; x ¹ - , 0 , 3
6. ; r ¹ , -3 , -2 , 1 , 4 , 5
7. - 1 ; n ¹ - 3 , - 1 , 1
8. ; x ¹ - 14 , - 7 , - 1
9. ; x ¹ - 3 , 0
10. ; x ¹ - 3 , 5
11. ; x ¹ y
12. ; x ¹ 0 , h ¹ 0 , x ¹ - h
13. t = ; t ¹ - 3 or 3
14. x = - 4 ; x ¹ 0 or 1