I figured out how to write letters and numbers on this quilt so that I could include a few math problems. Nothing is solved, mind you. I'm not that good! This one says, "(x + 3y) 2. I have two more but all of them have an embossed feel.
I also used lots of ideas from Leah Day's website.
I highly recommend her work. She has over 400 different designs on her site. Of course, it takes time to go through them all, and I haven't done that yet, but one page shows about 20 pictures just like the ones here. That allows me to look quickly at the designs and pick a couple that I want to try. Clicking on the link takes you to a page that explains how to recreate it. Some of them even have video clips. The designs are arranged in alpha order, design families, and difficulty level. In other words, it's a very useful site.
That's me in the pink shirt and black pants. The quilt I'm showing is "Math Is an Expletive."