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Across 4. Latin for horse 8. The Id and the ___ 10. 'A' in PEMDAS 12. Carved pumpkin 13. Certain chess piece 16. Chicken ___ 18. It's below a zxcvbnm? 19. Element 45 20. Karats in some gold 22. SI unit of frequency 24. To be or __ __ __ 26. E= 29. Bon Jovi song 30. Legs on an octopus 33. Of ___ & Men 35. A candy bar, or a book 37. Life Science 38. What's found in Hg Wells? 39. Impossible temperature 40. Track intersection 42. Opposite of pro 46. Rotating puzzle made of 27 blocks 48. The man of La Mancha 51. Base 16 system 52. Body part that is a homophone with a pronoun 54. Painting of the artist who made it 56. Hog's hello 57. Art of paper folding 58. Tornado shape

Down 1. A wave or a porcupine-like creature 2. Word spelled the same forwards and backwards 3. Energy needed in Back to the Future 5. Four times over 6. Unlucky feline 7. Query 9. inverse exponent 11. Set of volumes 14. Fear of heights 15. Dessert with a crust 16. Advanced degree 17. Where Oslo is located 21. Oval 23. Soft-shell taco 25. Spain in Spain 27. DNA 28. Spiderman's alter ego 31. Multidimensional modeler? 32. What you're doing 33. Polar shield? 34. the 's' in laser 36. Computer ailment 41. Nicolaus who proposed the heliocentric model 43. Expression with three terms 44. Square expression 45. The answer to life, the universe, and everything, per Adam Douglas 47. Assistant cook 49. 1 divided by 0 50. Competitor of Chrome 53. Exploding star 55. The loneliest number