$\frac{2}{3}\left(3f+12\right)+f$

$\int\sqrt{2t^3+4}3t^5dx$

$\frac{m^{8n}}{m^n}$

$6^2:4+3\cdot9-5$

$\left(x-5\right)\left(x+5\right)-\left(x+2\right)\left(x+8\right)$

$\int\frac{-12x^3\:-\:58\:x^2+15x+28}{2x^2+11x+5}dx$

$\cos\left(a\right)=\csc\left(a\right)\cdot\tan\left(a\right)\cdot\cos^3\left(a\right)$