$100x^260x+9$

$\frac{\csc\left(x\right)\cot\left(x\right)}{\sin\left(x\right)}=\csc^2\left(x\right)\cot\left(x\right)$

$10x\le-9$

$3xy+6y+8y+3z$

$-10\left(1-8x\right)-2\left(-3x-5\right)$

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

$-\left[3\left(-4+6\right)\left(-6+2\right)\right]$