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2-77.

$\frac{(x+2)(x+1)}{(x-1)(x+1)}+\frac{(x)(x-1)}{(x+1)(x-1)}$

$\frac{(x^2+x+2x+2)+(x^2-x)}{x^2+x-x-1}$

$\frac{2x^2+2x+2}{x^2-1}$

Review the Math Notes box and follow the example.

Review the Math Notes box and follow the example.