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Problem 1 ( 2 0 points ) . Consider the following regular expressions ( we omit the dot operator ) R 0 = 1 |

Problem 1(20 points). Consider the following regular expressions (we omit the dot operator)
R0=1|2|3|4|5|6|7|8|9
R1=0|1|2|3|4|5|6|7|8|9
R2=(0|1)* R0(0|1)
R3=00 R 0*(0|1)*
R4= R3* R2*000

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