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2.2.7 Arithmetic
Here are some first examples; they illustrate CoCoA evaluating arithmetic expressions.

Example 
  (2+3)(1+1);  -- multiplication, as usual
10
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  2^10;
1024
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  2+2/3;
8/3
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  1.5+2.3;  -- decimals are converted to fractions
19/5
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  Mod(27,5);
2
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  2*3;
6
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  Fact(4);
24
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For multiplication, one may use *, parentheses, or just a space.