$\lim_{x\to0}\frac{x^2+x+\sin\left(2x\right)}{x}$

$\int\frac{3x^2-4x+5}{\left(x-2\right)\left(x^2+3\right)}dx$

$\int5x.sin8x\:dx$

$1-2x\le0$

$\left(172x^2-\:12x^2\right)$

$\left(4t+3y\right)\left(16t^{2\:}-12ty+9y\right)$

$\int_1^9\left(\frac{1}{9}\right)\cdot x^1\cdot e^{-3}dx$