$log\log\:_{10}\left(400\right)+\log\:_{10}\left(80\right)+2\log\:_{10}\left(25\right)$

$\int\left(9.7\right)\cdot\sin^2\left(1.77+17x\right)dx$

$\frac{48a^2b^4c^6}{-2a^2b^4c^6}$

$2x^2n-2x^2+x^2-1$

$25y^2+15y=-2$

$\lim_{x\to1}\left(\frac{x^3-x^2-x-1}{x^2-x}\right)$

$sczs$