$9b^2-25b+16$

$\lim_{x\to0}e\left(x\right)-\left(\left(x+1\right)\cos\:\:\:\:\left(kx\right)\right)$

$10\left(9+8n\right)-6\left(7n+9\right)$

$\left(-5xy^2z\right)\left(3x+4y-2\right)$

$\int\:\:x^2\sqrt{\left(36-x^2\right)}^{-3}\:dx$

$\left(7m^{-2}m^2n\right)^2$

$3\sin\left(x\right)-\cos\left(2x\right)=1$