-2x(6x^4 -7x^2 +x-5 in standard form pls

Y=4x^2+x-1 solve using quadratic formula

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

What is the 12th term of b(n)=-4-2(n-1)