Question 1151737
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{{{i^2}}} = -1.


Therefore,


(10i − 4i^2) − (7 − 3i) = (10i - 4*(-1)) - (7 - 3i) = (10i +4) - (7 - 3i) = 


          = group real part and imaginary part separately = 


          = (4 - 7) + (10i + 3i) = -3 + 13i.     <U>ANSWER</U>


Now open your eyes widely and compare my answer with optional answers.
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