Question

$(a ^{2} - b ^{2} \div a ^{2} + b ^{2}) \div \sqrt{1 -((a {}^{2} - b {}^{2}) {}^{2} \div( a {}^{2} + b {}^{2} ) {}^{2} }$
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Answer 1

Answer:

(a^4+b^4-a^2+b^2)(√1-a^4+2a^2b^2-b^4)÷a^2×(1-a^4+2a^2b^2-b^4)