(-4y+3)-(-5y-2)去括号去括号!
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(-4y+3)-(-5y-2)去括号去括号!(-4y+3)-(-5y-2)去括号去括号!(-4y+3)-(-5y-2)去括号去括号!(-4y+3)-(-5y-2)=-4y+3+5y+2=y+5
(-4y+3)-(-5y-2)去括号去括号!
(-4y+3)-(-5y-2)去括号
去括号!
(-4y+3)-(-5y-2)去括号去括号!
(-4y+3)-(-5y-2)
=-4y+3+5y+2
=y+5
(-4y+3)-(-5y-2)去括号去括号!
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(2x+3y)-(5x-y)去括号
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