\ANG{
Fasse zusammen:
\begin{enumerate}
\item $5am^{2}-5am-5a^{2}m-2m\cdot 3a+(-5a)\cdot(-3am)-2a\cdot 2m\cdot 2m$
\item $\D\frac{1}{2}x^{2}-\frac{x}{2}-\frac{3}{2}-
  \frac{x^{2}}{3}+\frac{1}{3}x-\frac{2}{3}$
\item $\D\frac{1}{5}x\cdot 3y-\frac{x}{3}\cdot 0{,}3x-
  \frac{y}{7}\cdot 1{,}1y-0{,}6xy+x^{2}:10-y^{2}:7$
\end{enumerate}
}
%
\LSG{
\begin{enumerate}
\item $5am^{2}-5am-5a^{2}m-6am+15a^{2}m-8am^{2}=-3am^{2}-11am+10a^{2}m$ 
\item $\D\left(\frac{1}{2}-\frac{1}{3}\right)x^{2}+
  \left(\frac{1}{3}-\frac{1}{2}\right)x-\frac{3}{2}-\frac{2}{3}=
   \frac{1}{6}x^{2}-\frac{1}{6}x-\frac{13}{6}$
\item $\D
  0{,}6xy-0{,}1x^{2}-\frac{1{,}1y^{2}}{7}-0{,}6xy+0{,}1x^{2}-\frac{y^{2}}{7}=
   -\frac{2{,}1y^{2}}{7}=-0{,}3y^{2}$
\end{enumerate}
}
