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r=2.1.2.4.2.6.2.8
We move all terms to the left:
r-(2.1.2.4.2.6.2.8)=0
We add all the numbers together, and all the variables
r-(0.0032256)=0
We add all the numbers together, and all the variables
r-0.0032256=0
We move all terms containing r to the left, all other terms to the right
r=0.0032256
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