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11 + 0 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

\(\int {\cos ec(ax + b)\cot (ax + b)dx = .....\cos ec(ax + b) + c,(a \ne 0)} \)

\( - \frac{1}{a}\)

a

-a

\( - \frac{a}{b}\)