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1. {a ¹ 0 , b ¹ 0} 2. {r ¹ 3} 3. {t ¹ -1 or 1}
4. {x ¹ 1} 5. {y ¹ -2 or 2} 6. {m ¹ 1 or 5}
7. {m ¹ 1 or 2} 8. {x ¹ - 4} 9. {n ¹ -2 or 2}
10. {x ¹ 5} 11. 5ab (b ¹ -2 or 2} 12. {a ¹ ± b}
{a ¹ 0 , b ¹
0} 2. 
{r
¹ 3}
3. 
{t ¹ -1 or 1}
{x
¹ 1}
5. 
{y ¹ -2 or 2} 6.
{m ¹
1 or 5}
{m
¹ 1 or 2}
8. 
{x
¹ - 4} 9.
{n ¹
-2 or 2}
{x
¹ 5}
11. 5ab (b
¹ -2 or 2}
12. 
{a ¹ ± b}