Input: 1/x^2 +1/y^2-1
Write: `1/x^2 +1/y^2-1`
Output: $$ -1+\frac{1}{x^2}+\frac{1}{y^2} == -1+\frac{1}{x^2}+\frac{1}{y^2} $$ Result:$$-1+\frac{1}{x^2}+\frac{1}{y^2}$$
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