$\int \frac{1}{x(\log x)^2} d x$ is equal to

The value of $\int_{-1}^1 x|x| d x$ is

Area of the region bounded by curve $y^2=4 x$ and the $X$-axis between $x=0$ and $x=1$ is

The order of the differential equation $\frac{d^4 y}{d x^4}-\sin \left(\frac{d^2 y}{d x^2}\right)=5$