Условие:

156 − 96 : (12 : 4) : 2;
156 − 96 : 12 : (4 : 2);
(156 − 96 : 12) : (4 : 2);
4689 * 5 + 97308;
90000 − 6 * 2509;
76090 * 4 − 5673;
1485 : 5 * 4;
2496 : 8 * 7;
9999 : 9 * 8.

156 − 96 : (12 : 4) : 2 = 156 − 96 : 3 : 2 = 156 − 32 : 2 = 156 − 16 = 140
 
156 − 96 : 12 : (4 : 2) = 156 − 96 : 12 : 2 = 156 − 8 : 2 = 156 − 4 = 152
 
(156 − 96 : 12) : (4 : 2) = (156 − 8) : 2 = 148 : 2 = 74
 
4689 * 5 + 97308 = 24445 + 97308 = 120753
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}4689\\ 5\end{array}}\\ 23445\end{array}$
 
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}24445\\ 97308\end{array}}\\ \begin{array}{r}120753\end{array}\end{array}$
 
90000 − 6 * 2509 = 90000 − 15054 = 74946
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}2509\\ 6\end{array}}\\ 15054\end{array}$
 
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}90000\\ 15054\end{array}}\\ \begin{array}{r}74946\end{array}\end{array}$
 
76090 * 4 − 5673 = 304360 − 5673 = 298687
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}76090\\ 4\end{array}}\\ 304360\end{array}$
 
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}304360\\ 5673\end{array}}\\ \begin{array}{r}298687\end{array}\end{array}$
 
1485 : 5 * 4 = 297 * 4 = 1188
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}1485\\ \phantom{0}\underset{¯}{10}\\ \phantom{0}\underset{¯}{\phantom{0}}48\\ \phantom{00}\underset{¯}{45}\\ \phantom{00}\underset{¯}{\phantom{0}}35\\ \phantom{000}\underset{¯}{35}\\ \phantom{0000}0\end{array}& \begin{array}{l}\overline{)5}\\ \overline{\overline{)297}}\end{array}\end{array}$
 
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}297\\ 4\end{array}}\\ 1188\end{array}$
 
2496 : 8 * 7 = 312 * 7 = 2184
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}2496\\ \phantom{0}\underset{¯}{24}\\ \phantom{00}\underset{¯}{\phantom{0}}9\\ \phantom{000}\underset{¯}{8}\\ \phantom{00}\underset{¯}{\phantom{0}}16\\ \phantom{000}\underset{¯}{16}\\ \phantom{0000}0\end{array}& \begin{array}{l}\overline{)8}\\ \overline{\overline{)312}}\end{array}\end{array}$
 
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}312\\ 7\end{array}}\\ 2184\end{array}$
 
9999 : 9 * 8 = 1111 * 8 = 8888