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Input:
integral(semicircle(timer(-3)))
Write:
`integral(semicircle(timer(-3)))`
Compute:
$$\int semicircle(timer(-3))\ dx$$
Output:
$$\int semicircle(timer(-3))\ dx== \int (\sqrt {{timer(-3)}^{2}-{x}^{2}})\ dx$$
Result: $$\int (\sqrt {{timer(-3)}^{2}-{x}^{2}})\ dx$$
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