Here is the link

1) Find a photo and put it in your math steps folder.
2) Choose >File>Place... ; then browse an image from your drive.
3) Select the "Type" tool from the toolbox and write Calculus on the picture.
4) Select the text with Selection tool and choose Type>Create Outlines
5) Again select the text and choose Object>Compound Path>Make
6)Now select both the picture and the text then choose Object>Clipping Mask>Make. A window may be appeared if the text font is not simple. Click YES.
To select both text and picture, hold down the shift key.
7) Add a stroke or two.
8) Save calculus.ai to your folder. Next, save it for the Web into your Math Steps folder.