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Blackboard with a sum of a question mark and a light bulb
Related tags:
- mistake
- blackboard
- chalk board
- school board
- chalk
- school blackboard
- fail
- 3
- school sign
- number 3
- education
- board
- business education
- school education
- business school
- study
- education symbol
- plus symbol
- wrong sign
- plus sign
- school border
- question marks
- school symbol
- sign
- bulb
- wrong
- question
- school
- number
- plus
- business
- equal sign
- light sign
- signs and symbols
- light board
