Simplify the following: (5 i^3 t^4)/7 - 2 i^3 = i^2×i = (-1) i = -i: (5×-i t^4)/7 - 2 Put each term in (5 (-i) t^4)/7 - 2 over the common denominator 7: (5 (-i) t^4)/7 - 2 = (-5 i t^4)/7 - 14/7: (-5 i t^4)/7 - 14/7 (-5 i t^4)/7 - 14/7 = (-5 i t^4 - 14)/7: Answer: (-5 i t^4 - 14)/7
