Question 905255
That notation is fine.  You can put the triple left curly braces and the triple right curly braces for the rendering tags for any improvement:
Three of { on the left and 
three of } on the right.


3(x-1)<7(x+3)
{{{3(x-1)<7(x+3)}}}


The dot which appears is unavoidable because that is just how the rendering operates in this site.