Bored displeased woman looks sadly at camera keeps hands on cheeks being sick and tired of constant
Touched dark skinned sister and brother appreciate parents care, constant support, keep palms on hea
Pi number day, Celebrate Pi text chalk drawing on a school black board.
Exasparated unshaven man keeps hands on temples, has terrible headache, feels tired of constant work
Male business manager leaning on desk showing symptoms of burnout
Businessman in C collar feeling pain while telecommuting
Happy Pi Day
Depressed teenage girl keeping head on pillow while lying in bed
Electric water dispenser for pets, fountain drinker for cats, isolated on white background
Overworked lady massaging nose from destress at office desk
Youthful African American girl keeping head on palm while reading message
Youthful girl with depressed expression looking through messages
Cropped shot of businessman pulling ball of Newton cradle
Adult man with a shaved head and sportswear running with an expression of concentration
Blurred man pulling ball of Newton cradle
Automatic electric pet water dispenser. Smart cat and small dog drinker with mobile app connection.
Newton cradle representing momentum
Newton's cradle isolated
Electric water dispenser for pets, fountain drinker for cats, isolated on white background
Collision Balls close up
Stressed teenager looking through cyberbullying messages in cellphone
Businesswoman stressed and frustrated at desk in office, holding head.
Face of youthful African American girl looking aside with miserable expression
Cat looks with interest at automatic water fountain. Modern smart drinker for pets
Cat drinking from automatic water dispenser. Smart pet drinker with mobile app connection.
Smartphone with cyberbullying messages on screen and scattered pills
Stressed girl suffering from cyberbullying while lying on bed against window
Shallow focus shot of a drip with a liquid in a hospital with a man sitting in the background
Above angle of suffering teenage girl with smartphone sitting on the floor
Above view of stressed African American teenage girl covering face by hands
