calculating r1 r2

calculate r1 r2, calculating r1 + r2, calculating r2 from r1, calculating r1 and r2

calculating r1 r2. There are any references about calculating r1 r2 in here. you can look below.

calculate r1 r2

calculating r1 + r2

calculating r2 from r1

calculating r1 and r2

calculate r1 r2, calculating r1 + r2, calculating r2 from r1, calculating r1 and r2

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