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- assert 1+2j == complex(1, 2) == 2j+1
- assert 1+2j + 3+4j == 4+6j
- assert 1+2j - 3+4j == -2+6j
- assert (1+2j).real == 1
- assert (1+2j).imag == 2
- assert (1+2j)*(3+4j) == -5+10j
- assert (1+2j)*3 == 3+6j
- import cmath
- assert (1+2j)**2 == -3+4j
- assert (1+2j).conjugate() == 1-2j
- res = cmath.sqrt(1+2j)
- assert res == 1.272019649514069+0.7861513777574233j
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