Question

How do you write down an expression?

Ex. 3*5+2 3*6+2 3*8+2 3*-4+2 3*3+2 3*2+2 3*10+2
Expression:
3a+2

Answer 1

You show us two expressions and then ask how to write an expression. I must be missing something here.

An expression is a collection of terms, joined by + or - signs.

each term is a product, where factors are joined by * or / signs.

Factors may include a unary minus sign.