$\left(2a-9\right)\left(3a^2+7a\right)$

$\int\left(32\sqrt{x}\right)dx$

$3a^2-8a+1$

$\left(2k-f-j\right)^2$

$3+1\cos\left(0\right)\cos\left(\frac{\pi}{3}\right)$

$\csc\left(x\right)-cot\left(x\right)cos\left(x\right)$

$-7+\left[-5+\left(+2\right)-\left(3-8\right)+\left(-5\right)\right]-10\:\:$