$$( - 10 ) ^ { 3 } + ( \frac { 1 } { 2 } ) ^ { 2 }$$
$-\frac{3999}{4}=-999.75$
$$-1000+\left(\frac{1}{2}\right)^{2}$$
$$-1000+\frac{1}{4}$$
$$-\frac{4000}{4}+\frac{1}{4}$$
$$\frac{-4000+1}{4}$$
$$-\frac{3999}{4}$$
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$-\frac{3999}{4} = -999\frac{3}{4} = -999.75$