Example 1.7.4
  1. \(\begin{aligned}[t] 5-(-2)\amp=5+2\\ \amp=7 \end{aligned}\)

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

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

in-context