$4m^4+20m^2n+25n^2$

$5x=-25$

$\int_0^{log\left(4\right)}\left(e^{x-2y}\right)dy$

$\left(x+5\right)\left(x-8\right)\left(x+5\right)\left(x+8\right)$

$\left(6\cdot c+5\cdot n\right)^2$

$ab\left(a+b\right)^2+ac\left(a+c\right)^2+bc\left(b+c\right)^2$

$\frac{\left(1+cos^2x\right)}{csc^2x-1}$