**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*)?

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