ID 295367692 © Okanakdeniz | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
mathematic education science study physics university formula school book algebra equation mathematical paper symbol college lesson number studying teacher drawing theory concept background exam geometry learn lecture student calculation homework learning solution sign animation blackboard ink knowledge math scientific hand academic analysis calculate classroom problem research write cognition scholar test