Ok I find out. It's the chain rule of derivatives. Idk how to explain it tho. But in that case you have the derivative of the first body (3x-5) time the second body derivate -2(3x-5)^-3. The derivative of the first body is 3

Yeah, you are entering a not so straight forward math. When you get primitives and integrals will be crazy

Idk where this 3 come from, the power rule is nx^n-1 so it should be -2(3x-5)^-3. Maybe is a typo?

Math can be scary and complex, so if you can find a way to simplify it, go to this path (usually is the path expected)

The multiplication property says the other of the factor doesn't change the product. So basically this 4, the second therm and the third therm cam be multiple in any other. Because the second them has a power of 3, the simpler product is the last therm.

Yes plz

I didn't expected that you use e621. You account is so sfw lol