$$ 2 + 2 = 4 $$ $$ {:nonum:} 3 + 3 = 6 $$ $$ 4 + 4 = 8 $$
Equation (1)
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$$ 2 + 2 = 4 $$
(1)
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$$ 3 + 3 = 6 $$
Equation (2)
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$$ 4 + 4 = 8 $$
(2)