algebra

background

book

calculation

calculus

caucasian

child

class

classroom

closeup

college

difficult

drawing

education

elementary

equation

equations

exam

face

formula

girl

graph

hand

homework

kid

knowledge

learn

learning

lesson

math

mathematical

mathematician

mathematics

number

numbers

paper

pencil

person

primary

school

science

scientific

solution

student

study

studying

symbol

university

writing