<!-- test usage and rendering of the #expr: parser function -->
1: {{#expr: 4+2 }}

2: {{#expr: 4.15+2.15 }}

3: {{#expr: 4.15+2 }}

4: {{#expr: 4+2-1 }}

5. {{#expr: 4 + (2*2) }}

6. {{#expr: (2*2) + 4 }}

7. {{#expr: 3 / 0 }}

8. {{#expr: (3 * (6 - (12 / 2)) + 5) }}

9. {{#expr: (3 * 2 }}

10. {{#expr: 3 * 2) }}

11. {{#expr: 3 * }}