$3-\left(-2+11-\left(4-15-7\right)\right)-2+\left(-3-\left(5-26-1\right)+2\right)\:$

$\frac{d}{dx}\left(e^{xyz}=x+y+z\right)$

$4a+3-2a$

$tan^2xsinx=3sinx$

$\sqrt{0.0013212884}$

$\left(a+b\right)+\left(b+c\right)+\left(c+d\right)+\left(a-c\right)$

$\left(0.1a^{x+1}+\:2a^{x-2}y\right)\left(0.1a^{x+1}-\:2a^{x-2}y\right)$