Expression 2: Start integral from 0 to 12, end integral, "f" left parenthesis, "x" , right parenthesis "d" "x"∫120fxdx
equals=
1099.21099.2
2
Expression 3: 0 less than "y" less than "f" left parenthesis, "x" , right parenthesis left brace, 0 less than "x" less than 12 , right brace0<y<fx0<x<12