I have been teaching my course online for over a year now. Until this semester, I did not require typed up solutions. I felt that I needed to give them guidance. Or at least an alternative to word processor hell, as I like to call it.
Markdown was my path out. I thought it was simple enough with embedded latex for them to use. I started writing up some guidelines and then started to write up my solutions that way. After an hour, I realized it was still too complicated.
But I had latched onto the idea of typed up work. So I booted up NeoOffice and realized one can insert equations easily enough. This made me feel better as OpenOffice is free and cross-platform. Thus any of my students could use it if they did not have MSOffice already.
So I simply made it a requirement and went on with my life. My students all complied without a word of complaint. Done.
It looks better and they actually are writing more of an explanation than a chain of equations. Better for me and better for them.
Ask and ye shall receive.