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(x+7)(x-3)/(x-3)
x+7
c. (2a^2-8a)/(a^2-16)
2a(a-4)/(a+4)(a-4)
2a/(a+4)
b. 6x^2-3x/4 ÷ 2x-1/12
6x^2-3x/4 × 12/(2x-1)
3(6x^2-3x)/(2x-1)
3.3x(2x-1)/(2x-1)
9x
a. 3/(x+4)+5/(x+5)
{3(x+5) + 5(x+4)}/(x+4)(x+5)
(3x+15+5x+20)/(x+4)(x+5)
(8x+35)/(x+4)(x+5)
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