$3\cos\left(x\right)^4\cos\left(3\cos\left(x\right)\right)^43\sin\left(x\right)\left(-3\sin\left(x\right)\right)$

$\left(5v+3\right)-\left(4w+5v-7\right)+\left(6w-20\right)$

$\left(9+y^2\right)dx+4xy\:dy=0$

$\int\left(\frac{\sqrt{4x^2+1}}{x^4}\right)dx$

$10\left(7x+45\right)+4\left(5x+9\right)+15$

$\left(25x^2-10x+1\right)^2$

$\frac{\left(a-1\right)}{2b}\cdot\frac{\left(a-1\right)}{2a}$