Answer:
1. -3/5x^41+5/12
2. 14/3 or 80/21 (see explanation in step -by -step explanation)
Explanation:
1. For this you just have to simplify it
2. for this one if it is just 2/3 - (-4) then it would be 14/3 but if it is 2/3 - (-4)-6/7 then you get 80/21 ( to solve this you also just simplify it)