$\int_0^{1000}xe^{-2\left(x\right)}dx$

$80+212$

$\lim_{x\to0}\left(\frac{\left(1+x\right)^3-1}{x}\right)$

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

$.5m+.25=\frac{1}{2}$

$x^2+5x+24$

$\frac{1-\cos\left(x\right)^2}{1-\sin\left(x\right)^2}=\tan\left(x\right)^2$