$\frac{(998)^{2} -(997)^{2} -45}{(98)^{2} -(97)^{2}}$ equals

$\frac{(998)^{2} -(997)^{2} -45}{(98)^{2} -(97)^{2}}$ equals
1). 1995
2). 195
3). 95
4). 10

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