The expression given is.
[tex]2x^2-5xy-6+4x^2-3xy+1-x^2y[/tex]
Simplify the expression.
[tex](2x^2+4x^2)-(5xy+3xy)-x^2y-6+1[/tex]
Again simplify it more,
[tex]6x^2-8xy-x^2y-5[/tex]
It can further written as,
[tex]undefined[/tex]
Hence the correct option is C.
