Ok - I'll try again. I visited just now, but accidentally deleted everything!
With this one I really like the fact you've managed to get so close to the bee - having it on a page of maths cuts out clutter (and made me smile!)
I took it into Photoshop Elements 9 (I only know the basics, so I've really not done a lot!).
First of all I took it into 'Enhance > Adjust Color> Remove Color Cast'.
Then 'Enhance > Lighting > Levels'.
After that I went into Quick Edit and slide the bars on 'Shadows', 'Midtones' and 'Highlights' + I gave it a little sharpening.
I went back to main Edit and under 'Filter > Noise > Despeckle' I removed any noise.
After giving it a slight crop (trying to keep as much maths as possible), I played with the 'Dodge' and 'Burn' tools to lighten and darken certain areas.
I hope I have improved the image - all adjustments were minor!