Value of variable 2

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

Find the value of the variable $y$ for a given real value of the variable $x$ .

y = x - \frac{x ^{2} + 4}{2} + x^{3} - \frac{3}{x + 7}

Input

Value of the variable $x$ .

Print the value of the variable $y$ up to thousandths.

Input #1

Answer #1

Submissions 18K

Acceptance rate 51%