Suppose A=(dy)/(dx) of x^(2)+y^(2)=4 at ...

Suppose `A=(dy)/(dx)` of `x^(2)+y^(2)=4` at `(sqrt2,sqrt2), B=(dy)/(dx)` of `sin y+sinx=sinx.siny` at `(pi,pi)andC=(dy)/(dx)` of `2e^(xy)+e^(x)e^(y)-e^(x)-e^(y)=e^(xy+1)` at `(1,1),` then `(A-B-C)` has the value equal to.......

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