$5^6\cdot4^6$

$\frac{a\left(f-t\right)}{a\left(f+y\right)}$

$\left(13-x\right)^2$

$\frac{dy}{dx}-y\cot\left(x\right)=-\csc\left(x\right)$

$\left(8x^3+54\right)^2$

$\frac{2}{3}\left(x+2y\right)=\left(\frac{2}{3}\left(x+1\right)\right)\left(\frac{1}{3}+\left(\frac{3}{4}y\right)\right)$

$\int\sin\left(5a\right)\cos^3\left(5a\right)da$