Собственно, сабж:
(defvar datastr)
(defvar rstr)
(setq datastr "Сухофрукт спеет летом в 53 градуса тепла, а не зимой!")
(setq rstr (concatenate 'string (subseq datastr (floor (cos (/ pi 2))) (floor (sin (/ pi 2))))
(subseq datastr (* 2 7 3) (+ (* 5 8) 3))
(subseq datastr (+ (* 5 6) 9) (+ (* 6 6) 4))
(subseq datastr (ceiling (expt 65536 0.0625)) (floor (expt 59049 0.1)))
(subseq datastr (ceiling (expt 614656 0.25)) (- (* 5 7) 6))
(subseq datastr (* 4 3 4) (- (* 5 7 2) (* 3 7)))
(subseq datastr (floor (expt 282475249 0.1)) (/ 2664 333))
(subseq datastr (ceiling (expt 64 0.5)) (/ 6993 777))
(subseq datastr (- (* 6 7) 11) (floor (expt 1024 0.5)))
(subseq datastr (+ (* 5 8) (- 10 4)) (- (* 8 8) (- 30 13)))
(subseq datastr (/ 3075 123) (* 13 (floor (expt 4294967296 0.03125))))
(subseq datastr (* 2 2 3 (- 19 17)) (* (/ 3885 777) (floor (expt 9765625 0.1))))
(subseq datastr (+ (* 6 7) 1) (* 2 2 (floor (expt 25937424601 0.1))))
(subseq datastr (+ (* 3 12) 1 1) (- (* 5 2 2 2) 1))
(subseq datastr (+ (* 11 2 2) 1) (* 2 (- (* 5 5) 2)))
(subseq datastr (* 5 7) (* (- 1001 999) (+ -7 10) (- -19 (* 2 -11)) (+ 19 -17)))
(subseq datastr (floor (expt 380204032 0.2)) (ceiling (expt 7890481 0.25)))))
(format t "~s~%" rstr)
PS. Скрипт в KOI8-R (проверена работа в Steel Bank Common Lisp 1.5.1 при локали KOI8-R) можно скачать через gopher: gopher://sdf.org/9/users/saahriktu/filez/var/saahriktu20190402.lisp.lzma .