①(-2r²s)²÷4rs²②(5x²y^3)²÷25x^4y^5③(x+y)^3÷(x+y)④7a^5b^3c^5÷14a²b^3c⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)⑥(3x²y)²×(-15xy^3)÷(-9x^4y²)⑦(5m³n
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①(-2r²s)²÷4rs²②(5x²y^3)²÷25x^4y^5③(x+y)^3÷(x+y)④7a^5b^3c^5÷14a²b^3c⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)⑥(3x²y)²×(-15xy^3)÷(-9x^4y²)⑦(5m³n
①(-2r²s)²÷4rs²
②(5x²y^3)²÷25x^4y^5
③(x+y)^3÷(x+y)
④7a^5b^3c^5÷14a²b^3c
⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)
⑥(3x²y)²×(-15xy^3)÷(-9x^4y²)
⑦(5m³n²-6m²)÷3m
①(-2r²s)²÷4rs²②(5x²y^3)²÷25x^4y^5③(x+y)^3÷(x+y)④7a^5b^3c^5÷14a²b^3c⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)⑥(3x²y)²×(-15xy^3)÷(-9x^4y²)⑦(5m³n
①(-2r²s)²÷4rs²=r^3
②(5x²y^3)²÷25x^4y^5=y
③(x+y)^3÷(x+y)=(x+y)²
④7a^5b^3c^5÷14a²b^3c=a^3c^4/2
⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)=-8/3a^5bc^3
⑥(3x²y)²×(-15xy^3)÷(-9x^4y²)=-15xy^3
⑦(5m³n²-6m²)÷3m=3/5m²n²-2m
①r³
②y
③(x+y)²
④1/2 a³c⁴
⑤-8/3 a^5bc³
⑥15xy^3
⑦5/3m²n²-2m
柔柔弱弱 个房间飞兔兔
1,r^3 2,y 3,x^2 2xy y^2 4,1/2a^3c^4 5,-8/3a^5b4c^3 6,19xy^3 7,5/3m^2n^2-2m