Qual a diferença: What's up? How's it going? How are things? How’ve you been? What have you been up to?

what's up? How's it going? How are things? How’ve you been? What have you been up to?
What's the difference of these words?

POWER QUESTIONS
O professor das celebridades Daniel Bonatti ensina várias técnicas para você ter conversas melhores mesmo com conhecimentos básicos de inglês. Com as power questions você vai aprender a direcionar a conversa para onde quiser e com isso alcançar seus objetivos na comunicação. ACESSAR AULA
1 resposta
Leonardo96 19 293
Those are just different alternatives for the same thing... Except for "what's up" which implies you want to know what the person you're talking to is doing at that exact moment. The others are just all different alternatives for asking someone what it's going on in their lives lately and how things are in general.