$\left( 16+1 \right)+\left( 11-{5}^{2} \right)$
Evaluate the power$\left( 16+1 \right)+\left( 11-25 \right)$
Add the numbers$17+\left( 11-25 \right)$
Calculate the difference$17+\left( -14 \right)$
When there is a $+$ in front of an expression in parentheses, the expression remains the same$17-14$
Subtract the numbers$3$