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School formulas and drawings on a black school board, place for text
Separate yellow speech bubbles on white background.
Human hand chalk painting wooden furniture. Renewing old fashioned wood furniture with brand new colorful chalk paint.
Three pieces of colored chalk are arranged vertically on a green chalkboard, with the top one being blue, the middle one being peach, and the bottom one being light green.
with math formulas written in white chalk on black board background

Free stock photoschalk (712)