"I don't really have many uses for a conventional word processor because I create documents mainly using Xemacs, LaTeX and Mathematica, and LyX."

"One standard deviation away from the mean in either direction on the horizontal axis (the red area on the above graph) accounts for somewhere around 68 percent of the people in this group. Two standard deviations away from the mean (the red and green areas) account for roughly 95 percent of the people. And three standard deviations (the red, green and blue areas) account for about 99 percent of the people."

For additional neatness, try "solve y=f(x) for x" (as indicated in the comments)