15 À :: `^`(15, `*`(cos, `*`(x))) = `*`(`^`(3, `*`(cos, `*`(x))), `*`(`^`(.2, `+`(`-`(`*`(sin, `*`(x)))))))                                   Á :: [−3π;−3π/2] 

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À :: `+`(`*`(`/`(1, 4), `*`(Pi)), `*`(Pi, `*`(k))), `in`(k, Z) Á :: `+`(`-`(`*`(`+`(`*`(11, `*`(Pi))), `/`(1, 4)))); 1; `+`(`-`(`*`(`+`(`*`(7, `*`(Pi))), `/`(1, 4))))