$3-1\cdot10+6$

$-ax^2-a^2$

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

$\int\left(x^2-1\right)^3\left(x^3+1\right)^2dx$

$x^2+x-9\:=0$

$\lim_{x\to0}\left(\frac{x\left(1+a\cdot\cos\left(x\right)\right)-b\cdot sin\left(x\right)}{x^5}\right)$

$2\left(y+2\right)x^2$