Calculadora de ordem de operações (PEMDAS)

Calcular $\left(\left(\left(1 + 3\right)^{2} - 9\right) 2 + 1\right)^{2}$.

Adicionar:

$\left(\left({\color{red}\left(1 + 3\right)}^{2} - 9\right) 2 + 1\right)^{2} = \left(\left({\color{red}\left(4\right)}^{2} - 9\right) 2 + 1\right)^{2}$

Elevar ao poder:

$\left(\left({\color{red}\left(4^{2}\right)} - 9\right) 2 + 1\right)^{2} = \left(\left({\color{red}\left(16\right)} - 9\right) 2 + 1\right)^{2}$

Subtrair:

$\left({\color{red}\left(16 - 9\right)} 2 + 1\right)^{2} = \left({\color{red}\left(7\right)} 2 + 1\right)^{2}$

Multiplicar:

$\left({\color{red}\left(7 \cdot 2\right)} + 1\right)^{2} = \left({\color{red}\left(14\right)} + 1\right)^{2}$

Adicionar:

${\color{red}\left(14 + 1\right)}^{2} = {\color{red}\left(15\right)}^{2}$

Elevar ao poder:

${\color{red}\left(15^{2}\right)} = {\color{red}\left(225\right)}$

O valor da expressão é $225$A.