Question: Logplot of ODE solution

I have some differential equations that I want to plot on the same axis (as i have below), but would like to plot with a log scale to illustrate the fact that one is simply a logarithmic decay (solid line) and all the others are not.

I had used deplot and display to make the above graph,

but if you want more detail, here is a worksheet with the relevant differntial equations:
MaplePrimesGraphUpload.mw

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