Example 1.7.3
  1. \(\begin{aligned}[t] 5-2\amp=5+(-2)\\ \amp=3 \end{aligned}\)

  2. \(\begin{aligned}[t] 2-5\amp=2+(-5)\\ \amp=-3 \end{aligned}\)

  3. \(\begin{aligned}[t] -5-2\amp=-5+(-2)\\ \amp=3 \end{aligned}\)

in-context