**Problem : ** How many terms do the following expressions have?

a)
17*x*
^{2} + 4*xy* + 2*y*

b)
2*y* + 4 - 6*y* + *x*
^{2}

c)
8*y*
^{6}

d)
3*xyz* + 4*yz* + 2*xz* + *z*
^{2} - *xz*

b) 4

c) 1

d) 5

**Problem : ** In the expression
5*x* + 3*x*
^{2} - *xy* - 5*z* + *z*
^{3}
, what is the coefficient of...

a)
*x*
?

b)
*z*
?

c)
*z*
^{3}
?

d)
*x*
^{2}
?

e)
*xy*
?

f)
*z*
^{2}
?

b) -5

c) 1

d) 3

e) -1

f) 0

**Problem : ** What is the constant in the expression
4*x*
^{2} + 5 + *x*
?

**Problem : ** Simplify
5*x*
^{2} + *x*
^{3} -4*x*
^{2} + *x* + 6 - 4 + *x*
^{2} - 3*x*
by combining like terms.

**Problem : ** Simplify
7*y* + 14*xy* - 3*y* - 4*y* - 6*x*
^{2} - 2*xy*
by combining like terms.

**Problem : ** Simplify
14 +
*x* + 8*x*
^{2} -6 - *x* + 5*x*
^{2}
by combining like terms.