52 À ::                                    Á :: [π;5π/2] 

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ÎÒÂÅÒ 

À :: `+`(`&+-`(`+`(`*`(`/`(1, 3), `*`(Pi)))), `*`(2, `*`(Pi, `*`(n)))), `in`(n, Z) Á :: `*`(`+`(`*`(7, `*`(Pi))), `/`(1, 3))