$\left(3a+d\right)^3$

$5\cos\left(x\right)-10\sin\left(x\right)\cos\left(x\right)=0$

$-0.344\cdot6^3+4.13\cdot6^2-5.02\cdot6-74.4$

$\frac{2^5.3^4.2^4}{3^2.2^3.3}$

$15x^2-44x+21$

$\left(y^2+1\right)\left(x^2+1\right)dy=y^2dx$

$\lim_{x\to infinity}\left(-\frac{3x}{e^{\left(\frac{x}{3}\right)}}\right)$