`int(sin^(3)x+cos^(3)x)/(sin^(2)x.cos^(2)x)dx`

Explanation

`int(cos^(3)x+sin^(3)x)/(sin^(2)x.cos^(2)x)dx=int(cos^(3)x)/(sin^(2)xcos^(2)x)dx+int(sin^(3)x)/(sin^(2)x cos^(2)x)dx`
`=int "cosec" x cot x dx+int tanx sec x dx`
`=-"cosec" x+sec x+c`