Plate Cover *bow* (free write)

Last week we had to draw some plates ( e.g copying angle etc.). And we have to come up our our own cover design which should be made out of 2 1/8 illustration board . And this is what I made

The one in the left upper part is one of the thing I've done today which is our birthday corner #doodle :3

and the 2 pictures below are my cover for my plates the one on the right lower part is the cover and the other one is the back part which is full of different geometry figures and formulas . 

p.s those formulas actually made me dizzy thinking how does it work T_T