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Evaluate:
12\frac{1}{2}21
−12-\frac{1}{2}−21
13\frac{1}{3}31
Evaluate
-1
1
-2
−14-\frac{1}{4}−41
14\frac{1}{4}41
25\frac{2}{5}52
75\frac{7}{5}57
−75-\frac{7}{5}−57
15\frac{1}{5}51
-1/2
1/2
−53-\frac{5}{3}−35
53\frac{5}{3}35
It is done.