In order of operations do you add them subtract

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

Carly made a beaded necklace. 4/18 of the beads are blue and 1/3 of the beads are green. use benchmark fractions to estimate about what fraction of the beads in the necklace are blue or green. explain

What is (-m)to the -3rd power times n if m=2 and n=-24?