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plot exp(x),((5.58*x+39.09)/(4.31*x-39.11))^4,(2.122x/(8.469-x)+1)^4 from 0 to 1
plot exp(x),((5.58*x+39.09)/(4.31*x-39.11))^4,(2.122x/(8.469-x)+1)^4 from 0 to 1
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