composite image of numbers and charts against black background

20s 3d adult algebra angle background black blackboard body calculator caucasian chalkboard chart colour complexity computations computer cornea digital digitally drawn education equations eye eyeball eyelid eyes eyesight eyewear formula generated glasses graph graphic graphical grey hand hazel human icon image lifestyle male man mathematics maths no nose numbers of part pattern people perception portrait presentation reading sample sensory spectacles subject swatch transparent trigonometry vignetta white young