Answer
$-2$
Work Step by Step
RECALL:
The zero-exponent rule states that for any non-zero number $a$,
$a^0=1$
Note that $-\pi^0$ means "the negative of $\pi^0$."
Use the zero-exponent rule to obtain:
$=-(\pi^0)-(-\pi)^0
\\=-1 - 1
\\=-2$