$$(-10)\times(7+(-3))=((70\times7)+((-10)\times(-3)$$
$\text{false}$
$$-10\times 4=70\times 7-10\left(-3\right)$$
$$-40=70\times 7-10\left(-3\right)$$
$$-40=490+30$$
$$-40=520$$
$$\text{false}$$
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