How do you FOIL (7-a)^{2}?

How do you FOIL ${\left(7-a\right)}^{2}$?
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Finn Lucero
${\left(7-a\right)}^{2}=\left(7-a\right)\cdot \left(7-a\right)$
F irst terms: $7×7=49$
O utside terms: $7×\left(-a\right)=\left(-7a\right)$
I nside terms: $\left(-a\right)×7=\left(-7a\right)$
L ast terms: $\left(-a\right)×\left(-a\right)={a}^{2}$
Sum of FOIL $=49-14a+{a}^{2}$