$0.09a^6-0.6a^3+1$

$x\left(n-1\right)+3y\left(n-1\right)$

$\lim_{x\to\infty}\left(\frac{x^2+x-12}{x-1}\right)$

$\int\left(2x\left(x^2+12\right)^9\right)dx$

$3\left(x^2-2xy+y^2\:\right)-\left(2xy-x^2+2y^2\right)$

$\frac{n-5}{-2}\cdot\frac{-2}{n-5}\:$

$\left(1+\cos\left(x\right)\right)\left(\sec\left(x\right)-1\right)=\sin\left(x\right)\tan\left(x\right)$