Hi, Quick question. In the ti89 i can do this: x+1|x=2 Answer = 3 It works like x + 1 given x = 2...do 2+1 = 3. I'm not sure what the '|' operator would be called in this case... Anyway, is this shorthand possible in mathematica? like if i had: yy = E^T*C+C, and i wanted to specify C=1/6... what would do it?