$z^3+z+xy=1$

$\left(x^2+2xh+h^2-1\right)\left(x^2-1\right)$

$t\left(\frac{dx}{dt}\right)-2x=t\left(ln\left(3t\right)\right)$

$\csc^2\left(x\right)-\sec^2\left(x\right)=\frac{1}{\sin\left(x\right)^2\cdot\cos\left(x\right)^2}$

$y^2-25w^2$

$\ln\left(0.97\right)=\ln\left(x\right)$

$\frac{7}{3}\ge x$