Toán Lớp 8: Rút gọn phân thức sau:
$(x+2)^{3}+x(x-$ $x^{2})-(x+1)(7x+5)$
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Toán Lớp 8: Rút gọn phân thức sau:
$(x+2)^{3}+x(x-$ $x^{2})-(x+1)(7x+5)$
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