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-11/12-(3/13) = 0
5/7-(x/7)-(x/9)+8/9 = (3*x)/11
1.8*x+2.4 = 3.6*(x-0.5)+0.5*x
(x^2-1)^(x^2-(3*x))
x/4+x/2+1/4-(3/2) = 0.75*x-1.25
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