> 27*(38-17)
[1] 567
> ln(14^7)
Error in ln(14^7) : could not find function "ln"

> log (2)
[1] 0.6931472
> sqrt ((436/12))
[1] 6.027714
> a <- c(1:100)
> b <- seq(1,10,by=5)
> b <- seq(5,160,by=5)
> b
 [1]   5  10  15  20  25  30  35  40  45  50  55  60  65  70  75  80  85  90  95 100 105 110
[23] 115 120 125 130 135 140 145 150 155 160
> a =b
> b=c(87:56)
> d<-a*b
> d
 [1]  435  860 1275 1680 2075 2460 2835 3200 3555 3900 4235 4560 4875 5180 5475 5760 6035 6300
[19] 6555 6800 7035 7260 7475 7680 7875 8060 8235 8400 8555 8700 8835 8960