Hi i have a problem, my exams are coming up in two months but i have no idea about maths, such questions as:

Differentiate withrespect to x

(i)

3x8

(the 8 is the small 8 that does be on the top right hand corner)

(ii)

1

- (x2-4x)

2

to be honest i have no idea, can anyone help be please,

thanks.