Ответ:
306b+76-127+293b=(306b-293b)-(127-76)=13b-51
324x+96y-78*x=(324x-78x)+96y=246x+96y
490*a+252+130*a+251=(490a+130a)+(252+251)=620a+503
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Ответ:
306b+76-127+293b=(306b-293b)-(127-76)=13b-51
324x+96y-78*x=(324x-78x)+96y=246x+96y
490*a+252+130*a+251=(490a+130a)+(252+251)=620a+503