Doubt from integration

[Cos(2x)-Cos(2a)]/[Cos(x)-Cos(a)]
I'm getting different answer than integral calculator
I'm getting 2(xCos(a)+Sin(x))

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Your answer is also correct

Thanks for confirming

Is integral calculator an app?

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.integral-calculator.com/&ved=2ahUKEwi697aflMbnAhW96XMBHZtiD_MQFjAAegQIAhAB&usg=AOvVaw0EjIVn1VmMoq2xzNu1PmAY

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