56 + 39;
82 − 28;
49 + 44;
61 − 49;
19 + 74;
47 + 13;
90 − 73 + 8;
34 + 36 − 9;
84 − 58 − 7;
93 − (46 + 9);
(28 + 33) − 8;
54 − (42 − 7).

56 + 39; 82 − 28; 49 + 44; 61 − 49; 19 + 74; 47 + 13; 90 − 73 + 8; 34 + 36 − 9; 84 − 58 − 7; 93 − (46 + 9); (28 + 33) − 8; 54 − (42 − 7).

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 56 \\ 39 \end{array} \\ \begin{array}{r} 95 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 82 \\ 28 \end{array} \\ \begin{array}{r} 54 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 49 \\ 44 \end{array} \\ \begin{array}{r} 93 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 61 \\ 49 \end{array} \\ \begin{array}{r} 12 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 19 \\ 74 \end{array} \\ \begin{array}{r} 93 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 47 \\ 13 \end{array} \\ \begin{array}{r} 60 \end{array} \end{array}

90 − 73 + 8 = 17 + 8 = 25;

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 90 \\ 73 \end{array} \\ \begin{array}{r} 17 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 17 \\ 8 \end{array} \\ \begin{array}{r} 25 \end{array} \end{array}

34 + 36 − 9 = 70 − 9 = 61;

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 34 \\ 36 \end{array} \\ \begin{array}{r} 70 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 70 \\ 9 \end{array} \\ \begin{array}{r} 61 \end{array} \end{array}

84 − 58 − 7 = 26 − 7 = 19;

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 84 \\ 57 \end{array} \\ \begin{array}{r} 26 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 26 \\ 7 \end{array} \\ \begin{array}{r} 19 \end{array} \end{array}

93 − (46 + 9) = 93 − 55 = 38;

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 46 \\ 9 \end{array} \\ \begin{array}{r} 55 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 93 \\ 55 \end{array} \\ \begin{array}{r} 38 \end{array} \end{array}

(28 + 33) − 8 = 61 − 8 = 53;

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 28 \\ 33 \end{array} \\ \begin{array}{r} 61 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 61 \\ 8 \end{array} \\ \begin{array}{r} 53 \end{array} \end{array}

54 − (42 − 7) = 54 − 35 = 19.

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 42 \\ 7 \end{array} \\ \begin{array}{r} 35 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 54 \\ 35 \end{array} \\ \begin{array}{r} 19 \end{array} \end{array}