a: =1/5+5=26/5
b: =-3-3/2=-6/2-9/2=-9/2
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a/\(=\dfrac{1}{5}+5=\dfrac{1}{5}+\dfrac{25}{5}=\dfrac{1+25}{5}=\dfrac{26}{5}\)
b/\(=-\left(3+\dfrac{3}{2}\right)=-\left(\dfrac{6}{2}+\dfrac{3}{2}\right)=-\left(\dfrac{6+3}{2}\right)=-\dfrac{9}{2}\)
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TL
a/=−(3+3/2)=−(6/2+3/2)=−(6+3/2)=−9/2
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