$10b-30b^2$

$\left[\left(-26\right)+\left(-2\right)+\left(45\right)\right]\:+\:\left[\left(29\right)+\left(-123\right)+\left(-56\right)\right]\:=\:$

$4x^2+8x-13y+2=0$

$1-2.16$

$\frac{d}{dx}\left(x\right)=-6\sin\left(x\right)-3x$

$\frac{\left(1-p\right)^2}{p}=0.000000003$

$5\:\frac{dy}{dx}+\:4xy=10$