(-3)¹³ * (1 + i)¹³
(1 + i)¹³ = (1 + i) * ((1 + i)²)⁶
(1 + i)² = 1 + i² + 2i = 2i
(1 + i)¹³ = (1 + i) * (2i)⁶ = 2⁶ * (-1)³ * (1 + i) = -64 - 64i
(-3 - 3i)¹³ = 3¹³*2⁶ + 3¹³*2⁶*i = 102036672 + 102036672i
(n+4906):90=480.
n+4906=43200
n=43200-4906
n=738294
28360:(u-52890)=49
u-52890=709
u=52890+709
u=53599
4*1,25х-4*0,9у-3х+4,6у=5х-3,6у-3х+4,6у=5х-3х-3,6у+4,6у=2х+у