Question

-5+[-8+3•(-4+9)-3]=?

Answer 1

$\large\boxed{\begin{array}{l}\sf Em~uma~express\tilde ao~num\acute erica~resolvemos:\\\sf 1^a~potenciac_{\!\!,}\tilde ao~e~radiciac_{\!\!,}\tilde ao~(na~ordem~que~vier)\\\sf 2^a multiplicac_{\!\!,}\tilde ao~e~divis\tilde ao~(na~ordem~que~vier)\\\sf 3^a adic_{\!\!,}\tilde ao~e~subtrac_{\!\!,}\tilde ao~(na~ordem~que~vier).\\\sf Al\acute em~disso~eliminamos:\\\sf 1^o~\bigg(\bigg)\\\\\sf 2^o\bigg[~~\bigg]\\\\\sf 3^o~\bigg\{~\bigg\}\end{array}}$

$\large\boxed{\begin{array}{l}\sf-5+[-8+3\cdot(-4+9)-3]\\\sf -5+[-8+3\cdot(5)-3]\\\sf -5+[-8+15-3]\\\sf -5+[4]\\\sf -5+4=-1\end{array}}$