计算：7}3h+R6l2c0q3w)M;V/h7U+d
567×142+426×811-8520×507}3h+R6l2c0q3w)M;V/h7U+d
算式：提示5j7Z5?-R;N.Z(k)e7}3h+R6l2c0q3w)M;V/h7U+d
=)R5N1x0k*H0R;d+?7}3h+R6l2c0q3w)M;V/h7U+d