$$1(4 \times 2-1 \times 4)-6(2 \times 2-1 \times 1)+3(2 \times 4-4 \times 1)$$
$-2$
$$1\left(8-1\times 4\right)-6\left(2\times 2-1\times 1\right)+3\left(2\times 4-4\times 1\right)$$
$$1\left(8-4\right)-6\left(2\times 2-1\times 1\right)+3\left(2\times 4-4\times 1\right)$$
$$1\times 4-6\left(2\times 2-1\times 1\right)+3\left(2\times 4-4\times 1\right)$$
$$4-6\left(2\times 2-1\times 1\right)+3\left(2\times 4-4\times 1\right)$$
$$4-6\left(4-1\times 1\right)+3\left(2\times 4-4\times 1\right)$$
$$4-6\left(4-1\right)+3\left(2\times 4-4\times 1\right)$$
$$4-6\times 3+3\left(2\times 4-4\times 1\right)$$
$$4-18+3\left(2\times 4-4\times 1\right)$$
$$-14+3\left(2\times 4-4\times 1\right)$$
$$-14+3\left(8-4\times 1\right)$$
$$-14+3\left(8-4\right)$$
$$-14+3\times 4$$
$$-14+12$$
$$-2$$
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