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((sin^2a sin^2b +sin^2a cos^2b + cos^2a)...

`((sin^2a sin^2b +sin^2a cos^2b + cos^2a)+(sin^2(2pi+a)+cos^2(6pi-a)+1))/(sin^2(pi/3-4pi)+cos^2(8pi+pi/3)+2))`

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