$\color{#ADD8E6}{\text{19 + 6 - 7 + 23}}$
$\color{#ADD8E6}{\text{= 25 - 7 + 23}}$
$\color{#ADD8E6}{\text{= 22 + 23}}$
$\color{#ADD8E6}{\text{= 45}}$
$\color{#ADD8E6}{\text{26 - 4 + 3 + 10 - 8}}$
$\color{#ADD8E6}{\text{= 22 + 3 + 10 - 8}}$
$\color{#ADD8E6}{\text{= 25 + 10 - 8}}$
$\color{#ADD8E6}{\text{= 35 - 8}}$
$\color{#ADD8E6}{\text{= 27}}$
$\color{#6495ED}{\text{4}}$$\color{#87CEFA}{\text{5}}$$\color{#ADD8E6}{\text{6}}$
19 + 6 - 7 + 23 = 45
26 - 4 + 3 + 10 - 8 = 27
` 19 + 6 - 7 + 23 `
` = 25 - 7 + 23 `
` = 18 + 23 `
` = 41 `
` 26 - 4 + 3 + 10 - 8 `
` = 22 + 3 + 10 - 8 `
` = 25 + 10 - 8 `
` = 35 - 8 `
` = 27 `