I love that we can actually see two of the questions of the math exam - yay for complex numbers and how multiplying by i is equivalent to rotating by 90 degrees.
Unfortunately the artist messed up a bit in her resolution of the second question - there's an extra i on the right side of her equation (A) and in the left side of her equation (B) she should close the parens and multiply the whole thing by i. But she's doing the right thing to solve the question.
It's possible that those issues were done on purpose to show she's being careless, but I find it more likely that the artist forgot all about math...