Não consigo concentrar-me. Homem barbudo atento pressionando os lábios e tocando a cabeça ao colocar a mão no caderno - Banco de fotos e imagens

Big problems. Upset deep occupied man looking down supporting his head sitting by the table.

Have headache. Young businessman bowing head and pressing lips while having problems

Handsome businessman in shirt and glasses looking at laptop in office

Selective focused of exhausted, upset businessman holding crumpled paper while suffering from headache with closed eyes

Concentrated man sitting at his workplace while thinking about results of his work

Never give up. Young handsome man having headache and sitting by the table while working on laptop.

Hard business. Good looking tired man suffering from headache and using laptop while sitting by the table.

Bewildered young dark-haired male engineer staring at a technical drawing on the desk in his office

Suffering from headache. Dark-haired mature businessman feeling extremely awful suffering from headache

Initiative person. Hardworking intern working late at the office turning off his laptop

Close up of elderly man that keeping his eyes closed while preparing for difficult conference

Feeling disappointed. Cheerless bearded man sitting at the table and holding glasses while feeling gloomy