Caucasian male thinks about solving hard mathematic equation in studying
pensive man is working with laptop at home at evening, writing message in online chat and working on book. Business man laptop touches chin thinks over strategy work remotely from home, creative job
A young man ponders in a cityscape - a bustling intersection in the distance
A young man ponders in an urban setting - a supermarket in the distance
Guy Contemplates, Touches Beard, Reflects in Library
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Asian Man Stands on the Door and Thinks About Texting While Using the Phone. Excited Guy Chatting on Social Networks in the City Center at
Middle-aged hipster thinks about good idea smiling closeup
Woman thinks with closed eyes leaning on tree trunk at sunset. Depressed lady considering psychology help to cope with stress in calm
Contemplative man gazes out window in modern city apartment
Contemplating by the Pond: Reflections on the Eternal
Retro man in glasses thinks
The man looks at his laptop and thinks. Decision-making in education and business. Thinking and inventing while sitting with a laptop
Reflective Playtime: Cute Baby on Playground Swing, Engaging in Meditative Contemplation as an Infant Thinks
Thoughtful concerned indian woman working on laptop computer looking away thinking solving problem at home office, serious woman search for inspiration make decision feel lack of ideas, close up view
A young woman reflects on something troubling in a park
Pensive redhead woman looks out window touching chin with hand. Thoughtful lonely female thinks about meaning of life standing in bedroom closeup
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hand drawn doodle light bulb idea concept Loop animation with Alpha Channel
Contemplative senior adult man sitting in the dark as he thinks
In the toilet room, where the toilet and other sanitary devices are located, a woman sits on a floor toilet in clothes with a tired look and thinks about something. Women's problems and diarrhea.
Arabian Hispanic woman working financial paperwork seated at workplace using laptop looks concentrated while makes task, prepare, check report having fruitful workday. Student learning process concept
A young Caucasian woman thinks about something and looks troubled in a suburban area - an apartment building in the blurry background - ends in closeup
Lady rests leaning on tree trunk. Woman with thoughtful expression on face thinks about problems of life and sad memories. Oppression alone
Sad corporate employee looks at rain behind window. Lady top manager thinks about lost chances for company growth in office. Woman with
A thoughtful woman nods in a city at night - streetlight in the background
A Caucasian teenage boy thinks about something as he sits in front of school - closeup
Middle-aged hipster counts and thinks smiling closeup
Focused young blogger working at office.
A thoughtful Muslim woman nods in an urban park - closeup
A thoughtful man ponders on a bench in a city at night - streetlights in the background
A serious man sits at a computer in the office and thinks. Analyzes solves a crisis problem. A difficult stage in business. Thoughtful businessman
Person watching neighborhood. Person portrait from back while watching through window from inside the house. Lonely old man on chair.
Concerned elderly man thinks touching grey beard with hand
A thoughtful man sitting at a table with a desk lamp writes with a pen. Dark time of the day twilight on the background of the window a sad man thinks and writes
Business man thinks hard to remember a point for the camera - slow motion - shot on RED
A thoughtful man sitting at a table with a desk lamp writes with a pen. Dark time of the day twilight on the background of the window a sad man thinks and writes
Thinking woman at lilac background
Young Caucasian woman thinks about something with a frown in an urban area - an apartment complex in the blurry background - video ends in closeup
Thoughtful Young Woman in Blue Blouse. Contemplative Expression.
The thoughtful young man ponders and scratches his chin
Thoughtful young man pondering
Young businessman takes a break, enjoys the view of urban landscape and high rise buildings, while staying hydrated
Arabian Hispanic woman working financial paperwork seated at workplace using laptop looks concentrated while makes task, prepare, check report having fruitful workday. Student learning process concept
A sad man with problems thinks about something. Reflections and Meditation concept
Woman thinks about failures sitting on steps. Pensive lady with loose hair feels sorrows of wrong actions on stairs. Psychological issues
Reflective woman with ponytail gazes out window after waking up. Young woman in denim jacket contemplates future closeup.
Thoughtful young man rests on the grass and contemplates
Businessman in silhouette walking in his office at the big windows and starts looking outside and thinks
Thoughtful young woman in home office contemplates, arms crossed. Calm decision-making, problem-solving, and business ideas.