Line 9, characters 8-15:
9 | let x = (1 + 2) +. 3. in ();;
            ^^^^^^^
Error: This expression has type int but an expression was expected of type
         float
Line 2, characters 15-17:
2 | let x = (1 + 2 in ();;
                   ^^
Error: Syntax error: ) expected
Line 2, characters 8-9:
2 | let x = (1 + 2 in ();;
            ^
  This ( might be unmatched
Line 2, characters 14-16:
2 | let x = (1 + 2;;
                  ^^
Error: Syntax error: ) expected
Line 2, characters 8-9:
2 | let x = (1 + 2;;
            ^
  This ( might be unmatched
Line 3, characters 8-9:
3 | let y = 1 +. 2. in
            ^
Error: The constant 1 has type int but an expression was expected of type
         float
Hint: Did you mean 1.?
Line 4, characters 2-4:
4 | 2 in
      ^^
Error: Syntax error: ) expected
Line 2, characters 8-9:
2 | let x = (1
            ^
  This ( might be unmatched
Lines 2-4, characters 8-2:
2 | ........(1
3 |   +
4 | 2)...
Error: This expression has type int but an expression was expected of type
         float
Line 2, characters 12-17:
2 | let x = 1 + "abc" in
                ^^^^^
Error: This constant has type string but an expression was expected of type
         int
File "error_highlighting_use1.ml", line 1, characters 8-15:
1 | let x = (1 + 2) +. 3. in ();;
            ^^^^^^^
Error: This expression has type int but an expression was expected of type
         float
File "error_highlighting_use2.ml", line 1, characters 15-17:
1 | let x = (1 + 2 in ();;
                   ^^
Error: Syntax error: ) expected
File "error_highlighting_use2.ml", line 1, characters 8-9:
1 | let x = (1 + 2 in ();;
            ^
  This ( might be unmatched
File "error_highlighting_use3.ml", line 3, characters 2-4:
3 | 2 in
      ^^
Error: Syntax error: ) expected
File "error_highlighting_use3.ml", line 1, characters 8-9:
1 | let x = (1
            ^
  This ( might be unmatched
File "error_highlighting_use4.ml", lines 1-3, characters 8-2:
1 | ........(1
2 |   +
3 | 2)...
Error: This expression has type int but an expression was expected of type
         float