$\int x\left(6x^3+2\right)dx$

$-3\left(5x^2-3\right)$

$\int e^{8\cdot \theta}\sin\left(9\cdot \theta\right)d\left(\theta\right)$

$2y^2-3y+y^2$

$9xy+6xz+3x$

$\lim_{h\to0}\left(\frac{2h^3-5h^2+h}{h^4-h^2}\right)$

$\frac{\cos\left(v\right)\sec\left(v\right)}{\tan\left(v\right)}=\cot\left(v\right)$