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によって OtnaYdur 2912x4368 px
ストック写真ID: 11061991
Female hand writing formulas on blackboard with chalk, close up
Teacher hand writing formulas on blackboard background
Female student working on mathematics problem on blackboard
Female hand writing formulas on blackboard with chalk close up
Child's hand makes calculations on the blackboard
Hand of a student working on complex equation
Female student thinking about mathematics problem on blackboard
A student asking to the teacher about mathematics
Female student working on difficult equation on blankboard
Female student working on difficult equation on blankboard while holding book
