Reduce

Note the activity from the end of line 1 to the beginning of line 2.

2 1---2x2 +-x 1--2x2-+-x- -1x2- x12---2xx2-+--xx2 xl→im∞ x2 - 4 = xli→m∞ x2 - 4 ⋅ 1-= xl→im∞ x2 - 4- x2 x2 x2 x12---2+-1x- = xli→m∞ 1- 42 x

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