$\left(2x+15\right)^2$

$4x^2-17$

$x^3-x^2-x$

$\left(4x^4+3\right)^2$

$\left(5x+2\right)^2$

$\left(10x^{10}-6\right)^2$

$\left(2x+9\right)^2$

$\left(7x+8\right)^2$

$\left(3x-10\right)^2$

$\left(-5x+13\right)^2$

$\left(4x^2y-20xy^2\right)^2$

$\left(4x^2y-20xy^{ }\right)^2$

$\left(x-4\right)^2$

$\left(3x-10\right)^2$

$\left(10x^{10}-6\right)^2$

$\left(12x^{10}+4x^6\right)^2$

$\left(5xy+2\right)^2$

$\left(10z-6\right)^2$

$\left(x+12\right)^2$

$\left(x+8\right)^2$