(1x10^-14)-(7.24x10^-4)

$${\mathtt{1}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{\left(-{\mathtt{14}}\right)}{\mathtt{\,-\,}}{\mathtt{7.24}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{\left(-{\mathtt{4}}\right)} = -{\mathtt{0.000\: \!723\: \!999\: \!999\: \!99}}$$

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