$\left(2y-\left(\frac{3}{2}\right)\right)^2-\left(y-4\right).\left(y+\left(\frac{1}{2}\right)\right)-2y^2$

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

$-3\:x\:-2$

$\left(12mn+1\right)\left(12mn-1\right)$

$\lim\:_{x\to\:0}\left(\frac{sin\left(x^2+2x\right)}{3x^2+x}\right)$

$7^5\sqrt{7}^2$

$\frac{-\frac{8t}{125}}{1+\frac{4}{125}\left(-t^2+16\right)^2}$