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`and`(S = `+`(`*`(9, `*`(`*`(`/`(1, 2), 6)))), `+`(`*`(9, `*`(`*`(`/`(1, 2), 6)))) = `*`(a, `*`(b, `*`(c, `*`(`/`(`+`(`*`(4, `*`(R))))))))) 

`and`(b = sqrt(`+`(`^`(9, 2), `^`(3, 2))), sqrt(`+`(`^`(9, 2), `^`(3, 2))) = `+`(`*`(3, `*`(sqrt(10))))) 

`and`(R = `*`(a, `*`(b, `*`(c, `*`(`/`(`+`(`*`(4, `*`(S)))))))), `and`(`*`(a, `*`(b, `*`(c, `*`(`/`(`+`(`*`(4, `*`(S)))))))) = `+`(`/`(`*`(10, `*`(`*`(6, 9))), `*`(`*`(4, 27)))), `+`(`/`(`*`(10, `*`(`... 

`and`(h = sqrt(`+`(`^`(13, 2), `-`(`^`(5, 2)))), `and`(sqrt(`+`(`^`(13, 2), `-`(`^`(5, 2)))) = sqrt(`*`(8, 18)), sqrt(`*`(8, 18)) = 12))