(s*(C/CF+1)+1/(RF*CF))/(s*(C+1)+(1/(RF*CF)))
all prime numbers btween 80 and 90
2x+3+4x-2
3n+4=13
all prime numbers of 80 and 90
(1.25 ÷ 0.50)1 ÷ 9 − 1
6600/6
square root of
(4^1.5) rounded to the 19th decimal with exact precision
highest common factor of 12 and 2
By first rounding each number to 1 significant figure, find an estimate for 894 x 152
