$\frac{\left(sin^{\left(2\right)}\theta\:\:-cos\theta\:\:\right)}{\left(sin^{\left(2\right)}+sin\theta\:\:cos\theta\:\:\:\right)}=1-cot\theta\:$

$\frac{12x^2\:+3x\:\:}{-4x-1}$

$x^2+3x-12=0$

$3a+7b-a+8b$

$\lim_{x\to0}\left(\frac{\left(x-\frac{\pi}{2}\right)\sin\left(\frac{3\pi}{2}-x\right)}{1-\sec\left(x-\frac{\pi}{2}\right)}\right)$

$\left(-400\right):\left(-25\right):\left(-4\right):\left(-2\right):\left(-1\right)$

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