Answer
The expression evaluates to $10$.
Work Step by Step
We plug in the values given for $a$, $b$, and $c$ into the expression to evaluate it:
$$=3 + 1 - 2(-3)$$
According to order of operations, we do the multiplication first:
$$=3 + 1 + 6$$
Now, we can add from left to right:
$$4 + 6 = 10$$
The expression evaluates to $10$.
