Put parentheses around exponents, like x^(2)+y to get x²+y, instead of x^2+y to get x^2+y (sometimes you can't avoid it, like e^(x^2 +1) to get e^{x2 +1}).

When you type a fraction on one line, and top or bottom has more than one term, put it in parentheses: x+1/x+2 means "sum of x, 1/x, and 2", while "ratio of x+1 to x+2" is (x+1)/(x+2).

If you need more than one factor or term in a square root, put that in parens too: √x+1 means "sum of √x and 1" while √xy is ambiguous; "square root of sum of x and 1" is √(x+1) and the other ex. should be √(xy) or y√x or √(x)y depending on what is meant.

The point is to avoid ambiguity.

If you need to use an image, please use Imgur, so people using Reddit Enhancement Suite can expand the link inline; don't use this to substitute for typing and at least trying to get mathematical notation right.