Answer
26
Work Step by Step
$x^2+z-3$ $\longrightarrow$substitute the given values for each variable
$5^2+4-3$ $\longrightarrow$PEMDAS says to resolve exponent first
$25+4-3$ $\longrightarrow$add
$29-3$ $\longrightarrow$subtract
$26$
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