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r1188 vs r1189
1
[math(f(f(f(2C_1 = C_2) = 2C_2 = C_3) = 2C_4 = C_5 ))]
1
[math(f(f(f(2C_1 = C_2) = 2C_2 = C_3) = 2C_4 = C_5 )\cdots)]
22
33
44
......