$$1^{2}+2^{2}+2^{2}=3^{2}$$
$\text{true}$
$$1+2^{2}+2^{2}=3^{2}$$
$$1+4+2^{2}=3^{2}$$
$$5+2^{2}=3^{2}$$
$$5+4=3^{2}$$
$$9=3^{2}$$
$$9=9$$
$$\text{true}$$
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