Which expression is not a polynomial?

-+2 is not a Polynomial,This one is a radical term.

Explanation:

A polynomial can own:

That can be joined utilizing the four operations (+,-,*,/)

So: A polynomial can have, variables, constants, and exponents,

but  a variable can divide.

Also, they can have one or more terms, but not an endless number of cycles.

vx is not, because the exponent is "½" (see fractional exponents).

equal distribution i think.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.