$\lim_{x\to0}\left(\ln\left(\frac{\sin\left(x\right)}{\left(\pi-2x\right)^2}\right)\right)$

$\left(-6\cdot y^3\right)\left(x^4y^2\right)$

$\left(y-7\right)+\left(8+y\right)$

$\left(x^216y-x^613y\right)$

$80e^{0.02\left(0.11\right)}$

$1-\frac{a}{a-\frac{1}{a-\frac{1}{a}}}$

$12^2\times\:3^2$