**Problem : **
What is
*x*
^{2} + 3*x* - 5
?

**Problem : **
What is
?

**Problem : **
What is
4
?

**Problem : **
What is
?

**Problem : **
Let
*f* (*x*) = *x*
for
*x* < 1
,
*f* (*x*) = 1
for
*x*≥1
. What is
*f* (*x*)
?

**Problem : **
Let
*f* (*x*) = *x*
^{2}
for
*x* < 0
,
*f* (*x*) = - 1
for
*x*≥ 0
. What are
*f* (*x*)
,
*f* (*x*)
, and
*f* (*x*)
?