Unsupported titles/`lsqb`

Symbol

 * $$[a,b)=\{x\in\R\,|\,a\le x<b\}$$
 * $$\left[a,b\right[ = \{x\in\R\,|\, a\le x < b\}$$
 * $$\left[a,b\right[ = \{x\in\R\,|\, a\le x < b\}$$
 * $$\left]a,b\right[ = \{x\in\R\,|\, a < x < b\}$$
 * $$\left[a,b\right[ = \{x\in\R\,|\, a\le x < b\}$$
 * $$\left]a,b\right[ = \{x\in\R\,|\, a < x < b\}$$