$\frac{1}{15}$ + $\frac{1}{40}$
1 divided by 1-x
(2x-5)-(-5x-2)
1234 add 866
-13wx+11xy+6wy
2+4+2+2+2+2+2+2*11
2+4+2+2+2+2+2+2+*11
A ship needs one sixth less time to cover a distance of 180 km than a slower ship whose average speed is 5 km/h less than that of ...
2+4+2+2+2+2+2+2+*11000%22
