2×(80÷4-20÷2)×2+175-502×(20-10)×2+175-502×10×2+175-5020×2+175-5040+175-50215-50165
Therefore, the answer is 165.
2×(80÷4-20÷2)×2+175-50
2×(20-10)×2+175-50
2×10×2+175-50
20×2+175-50
40+175-50
215-50
165
Therefore, the answer is 165.