Expression 1: "x" plus 0.5 plus round left parenthesis, "x" , right parenthesis minus ceiling left parenthesis, "x" , right parenthesisx+0.5+roundx−ceilx
1
Expression 2: negative "x" minus 0.5 minus round left parenthesis, "x" , right parenthesis plus ceiling left parenthesis, "x" , right parenthesis−x−0.5−roundx+ceilx