1. ## Parenthesis

Parenthesis again.

[rant]

$\int 8x + 5 sin(x)~dx$ is not a valid expression. $\int (8x + 5 sin(x))~dx$ is!!!!

[/rant]

-Dan

2. ## Re: Parenthesis

Great example, thanks! However:

[Gotcha_mode=ON]
"Parenthesis" is singular, as in one mark "(" or ")." "Parentheses" is plural. Typically math expressions use parentheses in pairs, though a bracket and a single parenthesis may be used to denote a half-closed interval as in [3,8).
[Gotcha_mode=OFF]

3. ## Re: Parenthesis

That is, however, probably one of the least egregious "lack of parentheses" errors. We have both " $\int$" and "dx" to mark off the integrand. It is not nearly as bad as, say, "x^2- 3x+ 1/x^2+ 3x+ 4".