Evaluate Using the Given Value n^2-m ; use m=7 ; and n=8

$n^{2} - m$ ; use $m = 7$ ; and $n = 8$

Replace the variable $m$ with $7$ in the expression.

$n^{2} - (7)$

Replace the variable $n$ with $8$ in the expression.

${(8)}^{2} - (7)$

Simplify each term.

Raise $8$ to the power of $2$ .

$64 - (7)$

Multiply $- 1$ by $7$ .

$64 - 7$

Subtract $7$ from $64$ .

$57$