520 сантиметров)))))))))))
14 4/5 - 6 11/12 + 12 3/4 - 7 2/15= 13 1/2
8 (4/5-11/12)=8 (48/60-55/60)= 8-7/60= 7 53/60
7 53/60+12 3/4=19(53/60+3/4)=19 (53+45/60)=
=20 38/60=20 19/30
20 19/30- 7 2/15= 13 (19/30-2/15)=13 15/30=
=13 1/2
2 2/3 ×3 3/4=8/3× 15/4=10
10 2/3 - 3 11/12= 7 (2/3-11/12)= 7 (8-11/12)=7 -3/12=
=7 -1/4=6 3/4
2е^(2х) + (-7/2х)*х^((-7-2х)/2х)
(2х^2 - 3х +5)^(1/2)= 1/2 * (2х^2 - 3х +5)^(-1/2) * 4х * (-3)= -6х делить на корень из (2х^2 - 3х +5)
8х +3/х^2 -7
-2sin2x*cosx + cos2x * (-sinx)