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2.1.1
-1/9(9) = -1
4^2 / -1(4) = 16 / -4 = -4
2.1.2
(52𝑥 + 1 + 2) / (2.52𝑥) = (52𝑥 + 3) / (2.52𝑥) = 4(13𝑥 + 1) / 4(0.63𝑥) = 13𝑥 + 1 / 0.63𝑥