d: \(=x\left(x-1\right)\left(x-3\right)\)
h: \(=x\left(x+1\right)^2\)
\(a,=x\left(x-3\right)\left(x+1\right)\\ b,=x\left(x+1\right)\left(x+3\right)\\ c,=x\left(x-1\right)\left(x-3\right)\\ d,=x\left(x-1\right)\left(x-3\right)\\ e,=x\left(x-4\right)\left(x+4\right)\\ f,=x\left(2x-5\right)\left(x+3\right)\\ g,=x\left(x+3\right)\left(2x-5\right)\\ h,=x\left(x+1\right)^2\)