$s^2+1.6s+16$

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

$\lim_{x\to0}\left(\frac{\left(2\cdot n+1\right)sin\left(x\right)-sin\left(\left(2\cdot n+1\right)x\right)}{4sin^3\left(x\right)}\right)$

$\frac{dx}{dt}\:+\:xt\:=\:0,\:x\left(0\right)\:=\:5$

$\frac{\left(9x^2+1\right)}{\left(3x^2+x\right)}$

$\left(l\cdot\:y\:+\:\left(1\:-\:l\right)\cdot\:x\right)\cdot\left(l\cdot\:x\:+\:\left(1\:-\:l\right)\cdot\:y\right)$

$\int_{-1}^1-px^2dx$