well, let's keep in mind that there are 60 minutes in 1 degree and 60 seconds in 1 minute, so let's change the 35 degrees 51 minutes and 14 seconds to a degree value only.
since there are 60 seconds in 1 minute, 14" will be 14/60 minutes, that means about 0.2333333333333 minutes, so we can change 51'14" to 51.2333333333333'.
Now, there are 60 minutes in 1 degree, so there'll be 51.2333333333333/60 degrees in 51.2333333333333', that means about 0.8538888888888889°.
So 35°51'14" can be converted to just 35.8538888888888889°.
180° - 35.8538888888888889° ≈ 144.1461111111111°.
so about 144.1461111111111°, and since there are 60 minutes in 1 degree, 0.1461111111111° is just 0.1461111111111*60 = 8.76666666667.
from 8.76666666667 let's keep in mind that's minutes so 8.76666666667' or we can say 8' plus 0.76666666667, let use that decimal to get the seconds, 0.76666666667*60 = 46, and those are our seconds. so 8.76666666667 is really just 8'46".
so 180° - 35°51'14" is about 144°8'46".