$9a^2+12a-4$

$\left(a^{2x+1}-b\right)\left(a^{2x+1}+b\right)$

$4\left(tan^2\left(x\right)sec\left(x\right)\right)$

$\frac{216v^{2}}{6y^{4}}+\frac{343}{7}$

$\frac{\sqrt{x^2-8x+16}}{\left(x-4\right)\left(e^{2x}\right)}$

$2\left(m+3\right)-10+4m$

$\tan\left(x\right)x\cos\left(x\right)+\sec\left(x\right)$