Need help on number 34, would help fo know the steps in solving

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Can someone me i’m confused. will give brainliest and a whole bunch of points

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14