안경바꿔라 이게 휘어져보이는 둥글이들은

7ce98776c3811ef423e7f7e6429c701ba05582a582c5d7cd19e835ab98d70563640c309fb5e3accfde020e1863ba771aabcac6

7b9bf105c4866ef0239d8eed379c701bc9737475f61faecb25fa254684b70b88c31854fdb8288754b9ba78fd7da4a382b5728c8e

7be8857fb3841ef3239b8fe5359c706ac91b668129961495a22fb79977c482d07519d4c73e42f5f38db074b9527c89414d393c

7fec8772b2f06f8423e680e1339c701b7584c3d25dc0ef91fee12a6bb772c788c1ebcc88388b7b920c569bb3c110d92c12a4d5

7be58070b2f61b8723e98794479c706df8d3c1ffdd5d5fa199ab9cc7f3d1a7904197a8c28289abf3218d97419651d38f92444913

0ce48973b4861cf123edf597439c701893deea94f613c33962bf9d0ec50e35a06d692e6e1c7778a8e49cd0b6fedeaab1bb596e

7cef8570b6f368f1239b83e0479c706c374e6ebb8a1b442a2a6db0093621f982fe1d8acaec2f019f420e60f5a89290f5172427c3

0e9e8377b3806c87239981e5359c701cb9750bbfaebdd09affbcc28b684580de2e299a8f7de863df95db9f2bec00d6660915f5

09e58700c3861bf2239e81e4419c701fffcdfef387519f5d5012e363253e7b5bb427852aed1dc8a336b8fdab0a7a3cc52b43fc28

7be98676c7851af223ed80e6329c706c905e906afd56f4c0002ea39b22428f3b0ee551df0a127f5cdbef4f75dccfcb1e2338d5de

7e9ff17fb4f31c8523ea84e4479c701e691628739e2f108bd759a9c8ebc2e0f6ee495ef1f2ef826cefc3f37a0f74fd8d3d3050


곡률도 공부하고