$\lim_{t\to0}\left(\frac{sin2t}{t}i+\left(t-2\right)^5j+t\ln\left(t\right)k\right)$

$\left(x^5-2x^3-x-8\right)\left(x^2-2x+1\right)$

$2\left(x+3\right)+5\left(x-2\right)\le2x-1-2\left(x-3\right)$

$7x^2\cdot2x^2\cdot7y$

$\int\frac{6x+2}{x^3-x^2-2x}dx$

$6xy-4ax$