#Question no. 1
(5*4)^(4*5)-56
## [1] 1.048576e+26
23-1*(8-12)
## [1] 27
56/8*(3+4)
## [1] 49
45-5*8+(8+9)
## [1] 22
#Question no. 2
a <- c(2, 5, 6, 7)
b <- c(1, 0, 9, 8)
c <- c(6, 5, 8, 3)