m-98 и n+56найди сумму?
x-16 и y-24 найди разность?
(m-98)+(n+56)=m-98+n+56=m+n-42
(m-98)-(n+56)=m-98-n-56=m-n-154
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(m-98)+(n+56)=m-98+n+56=m+n-42
(m-98)-(n+56)=m-98-n-56=m-n-154