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A polynomial is given by $p=-3\mathrm{.}5w^2+0\mathrm{.}5w-6\mathrm{.}5.$ Read $w$ from input as a float and compute $p$ using the polynomial.

Ex: If the input is $3\mathrm{.}8,$ then the output is:

$-55\mathrm{.}140$

Note: $w^2$ can be computed using $*$

$\frac{1}{1}$

$\frac{1}{3}$

$4$