\(\left(2x-5\right).\left(4-3x\right)-\left(3x+11\right).\left(5-2x\right)-15\left(2x-5\right)\)
\(=\)\(\left(2x-5\right).\left(4-3x\right)+\left(3x+11\right).\left(2x-5\right)-15\left(2x-5\right)\)
\(=\left(2x-5\right).\left(4-3x+3x+11-15\right)\)
\(=\left(2x-5\right).0\)
\(=0\)