Let's simplify the expression step by step:

2cot(90) - 3cos(270) + 5sin(0)

cot(90) = 0, because cot(90) is the reciprocal of tan(90), and tan(90) is undefined.

So, the expression becomes:

2(0) - 3cos(270) + 5sin(0)

cos(270) = 0, because the cosine function is 0 at 270 degrees.

sin(0) = 0, because the sine function is 0 at 0 degrees.

So, the expression now is:

2(0) - 3(0) + 5(0)

0 - 0 + 0

0

Therefore, the simplified expression is 0.