Simplify `3/6x2/5x(-4)/5x`

Simplify :((-3)/(2)x(4)/(5))+((9)/(5)x(-10)/(3))-((1)/(2)x(3)/(4))

Simplify: (3x-2)(2x-3)+(5x-3)(x+1)

Simplify: (-3)/(5)x(-(10)/(9))x((21)/(-4))x(-6)

Simplify: 9x^(4)(2x^(3)-5x^(4))x5x^(6)(x^(4)-3x^(2))

Simplify :3x^(2)-[7x-{5x^(2)-(2x-3)(4x-2)-5}-2]

Simplify: ((3)/(2)x(1)/(6))+((5)/(3)x(7)/(2))-((13)/(8)x(4)/(3))

Simplify: (3x^(3)-4x^(2)+5)-(2x^(3)-2x^(2)+3)

Simplify : (25\ x\ a^(-4))/(5^(-3)\ x\ 10\ x\ a^(-8)) (ii) (3^(-5)\ x\ 10^(-5)\ x\ 125)/(5^(-7)\ x\ 6^(-5))

Simplify: (3x + 4)(2x - 3)+(5x - 4)(x + 2)