$$(1 \times 2 \times 3)+(2 \times 3 \times 4)+(3 \times 4 \times 5)+(10 \times 11 \times 12)$$
$1410$
$$2\times 3+6\times 4+12\times 5+110\times 12$$
$$6+6\times 4+12\times 5+110\times 12$$
$$6+24+12\times 5+110\times 12$$
$$30+12\times 5+110\times 12$$
$$30+60+110\times 12$$
$$90+110\times 12$$
$$90+1320$$
$$1410$$
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$2\times 3\times 5\times 47$
