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-3

You want exponents, so let's do this

x^2 - x^2 - 3

You want multiplication, so let's do this

0 * 1 + x^2 - x^2 - 3

You want division, so let's do this

4/4 - 3/3 + 0 * 1 + x^2 - x^2 - 3

We've already got addition and subtraction

You want parentheses, so let's do this

4/4 - (3/3 + 0*1) + x^2 - x^2 - 3

...