How do you expand #(y+x)^4#?

Related questions

• What is Pascal's triangle?
• How do I find the #n#th row of Pascal's triangle?
• How does Pascal's triangle relate to binomial expansion?
• How do I find a coefficient using Pascal's triangle?
• How do I use Pascal's triangle to expand #(2x + y)^4#?
• How do I use Pascal's triangle to expand #(3a + b)^4#?
• How do I use Pascal's triangle to expand #(x + 2)^5#?
• How do I use Pascal's triangle to expand #(x - 1)^5#?
• How do I use Pascal's triangle to expand a binomial?
• How do I use Pascal's triangle to expand the binomial #(a-b)^6#?