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(x=cos(t) +t*sin(t) and y=sin(t)-t*cos(t))

`(x=cos(t) +t*sin(t) and y=sin(t)-t*cos(t))`

Compute: $$x=cos(t)+t\ sin(t)\ and\ y=sin(t)-t\ cos(t)$$

Output: $$ x=cos(t)+t\ sin(t)\ and\ y=sin(t)-t\ cos(t) == x=cos(t)+sin(t)\ t\ and\ y=sin(t)+(-cos(t))\ t $$ Result:$$x=cos(t)+sin(t)\ t\ and\ y=sin(t)+(-cos(t))\ t$$

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