$$( v i ) ( 84 \div 3 + 9 ) \times 15 - 11 = 544$$
$v=-i$
$$vi\left(28+9\right)\times 15-11=544$$
$$v\times \left(37i\right)\times 15-11=544$$
$$v\times \left(555i\right)-11=544$$
$$v\times \left(555i\right)=544+11$$
$$v\times \left(555i\right)=555$$
$$v=\frac{555}{555i}$$
$$v=\frac{555i}{555i^{2}}$$
$$v=\frac{555i}{-555}$$
$$v=-i$$
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