6x7+139-56/54+(48-76)x(95-86)x25

     6*7+139-56:54+(48-76)*(95-86)*25

= 42 +139-$$\frac{28}{27}$$+(-28)*9*25

= 42 + 139 - $$\frac{28}{27}$$ -6300

= 42 +139 -1-$$\frac{1}{27}$$ -6300

= 180- $$\frac{1}{27}$$ -6300

=-6120,037037... =-6120 1/27