Answer
777
Work Step by Step
$x^2+5y-112$ $\longrightarrow$ substitute given values
=$23^2+5(72)-112$ $\longrightarrow$ resolve exponent
=$529+5(72)-112$ $\longrightarrow$ multiply
=$529+360-112$ $\longrightarrow$ add/subtract working left to right
=$889-112$
=$777$