How many grams in a kg

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

If f(x) = -5x + 1 and g(x) = x3, what is (gºf)(0)? enter the correct answer