You can use

```
Context("Numeric");
Parser::Number::NoDecimals;
ANS(Compute("$c/2 pi")->cmp);
```

to get the effect of your first example using MathObjects. Note that your flags do **not** prevent students from entering decimals or functions. They only affect how the student and correct answers are *displayed*.

If you want to disable functions so that students have to write `1/2`

rather than `sin(pi/6)`

, then you can use

```
Context()->functions->Disable('Trig');
```

There are other categories that can be disabled, or you can disable individual functions. See the Wiki page on Answer Checkers and the Context for details.

Davide