$2x^3+x^2y-4x^2$

$\sin\left(\frac{x}{2}\right)^2-\cos\left(\frac{x}{2}\right)^2=0$

$36a^2+60a^2+25$

$\log\left(x-1\right)+\log\left(5\right)=\log\left(3x+1\right)$

$2cot\left(40^{\circ}+a\right)+12.65=13.763$

$\left(\left(\frac{x}{y^3}\right)^{\frac{1}{2}}\right)^{\frac{2}{3}}$

$sin^2\left(x\right)-sin\left(4x\right)=0$