$\int_0^1\:\frac{\sqrt{arctan\:x}}{1+x^2}dx$

$\lim\:_{x\to\:0}\left(\frac{e^{3x}-1-3x}{1+x^2-cos\left(x\right)}\right)$

$25+3\left(42-32\right)2-562-5\left(32\right)$

$\frac{du}{dt}=\left(2+t\right)\left(1+u\right)$

$\left(4x-8\right)\left(x+3\right)<0$

$-8x\left(-3\right)x\left(-1\right)$

$121m^2+44+4$