$$\sqrt{ ( { 2 }^{ 2 } )-(- { 3 }^{ 2 } )+(5-7) }$$
$\sqrt{11}\approx 3.31662479$
$$\sqrt{4-\left(-3^{2}\right)+5-7}$$
$$\sqrt{4-\left(-9\right)+5-7}$$
$$\sqrt{4+9+5-7}$$
$$\sqrt{13+5-7}$$
$$\sqrt{18-7}$$
$$\sqrt{11}$$
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