вычислить (13)-¹-(-67)+(12)²:2​

1))) (13)⁻¹-(-67)+(12)²:2​=

(13)⁻¹=3

-(-67)=6/7

(12)²=1/4

2))) 3+6/7+1/4:2=

3+6/7=(3*7+6)/7=27/7

1/4:2=1/4:2/1=1/4*1/2=1/8

3))) 27/7 + 1/8 = (27*8+1*7)/7*8 = (216+7)/56 = 223/56 = 3ц 55/56