Please help me . I’m begging you :( thank you

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Find the value of the variable and the length of each chord for #5 and #6.