two dimensional input in mathematica

1. move complementary position by pressing Ctrl+5
2. Type fraction by Ctrl+/
3. Type superscript by Ctrl+6
4. Type subscript by Ctrl+-
5. Type overscript by Ctrl+7
6. Type underscript by Ctrl+=
7. Type square root by Ctrl+2
8. Type radicals by square root and moving complementary position.