5 + 36 : ( 3 ⋅ 5 − 6 ) − ( 56 : 7 − 2 ) ⋅ 3 {\displaystyle \ 5+36:(3\cdot 5-6)-(56:7-2)\cdot 3\ }
5 + 36 : ( 3 ⋅ 5 15 − 6 ⏟ 15 − 6 9 9 ) − ( 56 : 7 8 − 2 ⏟ 8 − 2 6 6 ) ⋅ 3 = 5 + 36 : 9 ⏟ 4 − 6 ⋅ 3 ⏟ 18 = 5 + 4 − 18 = − 9 {\displaystyle {\begin{array}{c}5+36:(\underbrace {{\cancelto {\color {Red}15}{3\cdot 5\ \ }}-6} _{\begin{matrix}{\cancelto {\color {red}{9}}{\quad {\color {Red}15}-6\ \ }}\\{\color {red}\mathbf {9} }\end{matrix}})-(\underbrace {{\cancelto {\color {Red}8}{56:7\ \ }}-2} _{\begin{matrix}{\cancelto {\color {red}6}{\quad {\color {Red}8}-2\ \ }}\\{\color {red}\mathbf {6} }\end{matrix}})\cdot 3=\\5+\underbrace {36:{\color {red}\mathbf {9} }} _{\color {red}\mathbf {4} }-\underbrace {{\color {red}\mathbf {6} }\cdot 3} _{\color {red}\mathbf {18} }=\\5+{\color {red}\mathbf {4} }-{\color {red}\mathbf {18} }=-9\end{array}}}
