int(sin12 theta-sin9 theta)/(2cos7 theta...

`int(sin12 theta-sin9 theta)/(2cos7 theta-1)*d theta" is equal to" `
(1) `(cos2 theta)/(2)+(cos5 theta)/(5)+c`
( 2) `(cos5 theta)/(2)-(cos2 theta)/(5)+c`
(3) `(cos2 theta)/(5)-(cos5 theta)/(2)+c`
(4) `(cos2 theta)/(2)-(cos5 theta)/(5)+c`

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