All you need is in the photo

PLEASE DON'T DO STEP BY STEP BECAUSE IS SO CONFUSING ​

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

With alll of except for the 2 that i did already

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1