Open copybook with math formulas and pen on wooden table, closeup
Palabras clave
closeup,
copybook,
formula,
mathematic,
open,
pen,
table,
wooden,
1,
algebra,
back,
background,
class,
classroom,
college,
colours,
counting,
education,
equation,
exam,
exercise,
formula,
geometry,
homework,
cognition,
learn,
learning,
lesson,
mathematical,
mathematic,
mathematic,
nobody,
object,
paper,
pupil,
school,
science,
september,
sheet,
solution,
stationery,
student,
study,
studying,
subject,
task,
instructing,
university
){kind=link}