bài 1 ; bỏ dấu ngoặc rồi thực hiện phép tính

a, -5-\((\)-3\()\)\(+\)\((\)-4\()\)-\((\)2-4\(+\)3\()\)

b, 2-\((\)\(+\)4\()\)-\((\)-3\()\)\(+\)\((\)-5\(+\)7\()\)

c,-5-\((\)-5\()\)-\((\)-4\(+\)8\()\)

bài 2 ,rút gọn;

a, \((\)-x\(+\)4\()\).\((\)x²\(+\)4x\(+\)16\()\)

b, -3x²\((\)-5x\(+\)4y\()\)\(+\)5xy.\((\)-3x\(+\)2\()\)

c, 4xy.\((\)3x²-5\()\)-3y\((\)4x³-5yx\()\)

rút gọn phân số;

a,\(\frac{25^4}{5^6.3^2}\)

b, \(\frac{3^8.6^8}{18^8}\)

c, \(\frac{(x^3.y)^4}{x^4.y^3}\)

d, \(\frac{-x^6}{x^2}\)

e, \(\frac{(-x)^6}{x^2}\)