Calculați
AM NEVOIE URGENT VA ROG!

a) (-1/18 + 1/12)-(-1/18 - 1/24):(-14/9)=
1/36 - ( -7/72) : (-14/9)=
1/36+ 7/72 : (-14/9)=
1/36 - 7/72 x 9/14=
1/36 - 1/8 x 1/2=
1/36 - 1/16=
-5/144