What is 8 - 9z = 11 called?

How do we call each part of this expression?

3x - 4y + 15

What do you call this?
2 + 3x $<$   5

Write algebraically the following:

I think of a number, double it and add three to it

Write algebraically:

I think of a number, add four to it then multiply it by 2

How do you write:

I think of a number, multiply it by 7, then subtract it from 12?

I think of a number, multiply it by itself and add 3 to it

Simplify a x a x 2 x a

Simplify:

a + 2b + 3b - 7a

2 x d x 4 is?

Simplify

d + d+ d + d + d + d +d

k $\div$   7 can be written as

1b is the same as