find the derivative of y in;

y=3x^5-5x^3+2/x^2

y=(sinx+2cosx) (1/x+x^2)

y=e^x-e^-x /2x+1

y=3sin (5x^3 -1)

The expressions are ambiguous.

y=3x⁵-5x³+(2/x²)

dy/dx=15x⁴-15x²-(4/x³); or

y=(3x⁵-5x³+2)/x²=3x³-5x+(2/x²),

dy/dx=9x²-5-(4/x³).

y=(sin(x)+2cos(x))(1/(x+x²))

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