a = 65
a
## [1] 65
b = 70
b
## [1] 70
c = a+b
c
## [1] 135
d = (a*b)+(a+b)-(a/5)
d
## [1] 4672
e = (a/5)*(b/5)
e
## [1] 182
x <- 40+5
80/5-> x
x  
## [1] 16
f = sin(30)
f
## [1] -0.9880316
g = sin(30)+cos(45)
g
## [1] -0.4627096