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1.2x²+x-1/2x²+5x-3
3/2x²+6x-3⇒2x²+12x-3
2.x²-2x+1/x²-1
x²=x∧4/x²
(x∧4+1)/x²-2x-1
x∧4+1-2x³-x²
3.6c²-13c+2/c²+10c-8
6c²=6c∧4/c²
(6c∧4+2)/c²-3c-8
6c∧4+2-3c³-8c²
4.2x²-2/x²+2x+1
2x²=2x∧4/x²
(2x∧4-2)/x²+2x+1
2x∧4-2+2x³+x²