When you order them in standard form, you need to put them in ascending order of the exponents. Therefore the -3x^2 would come first, which makes the number attached (-3) the lead coefficient.
Also, since the number (2) without an x attached would be last (due to the power of x technically being 0), than that is the constant.
First multiply everything inside the brackets by seven 7x^4-42+3 Then solve what you can 7x^4-39 You an't solve it further. Is this what you mean? X to the fourth power?
