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Follow the pattern\textbf{Follow the pattern} Follow the pattern
21+12\mathbf{21 + 12} 21+12
33\mathbf{33} 33
22+12\mathbf{22 + 12} 22+12
34\mathbf{34} 34
23+12\mathbf{23 + 12} 23+12
???
45\mathbf{45} 45
1
35\mathbf{35} 35
2
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789()456×÷123+-0.%=