\ANG{
Berechne:\qquad (a) $\D 30-3\cdot 2^3+2\cdot 3$\qquad
  (b) $\D 3^{4}-4^{3}$\qquad
  (c) $\D 2647-3\cdot 2^{3+2\cdot 3}$
}
\LSG{
(a) 12\qquad (b) 17\qquad (c) 1111
}
