$\left(\sec^2x-1\right)\cos^2x=\sin$

$25n^2-36$

$\left(3^1x^3y^6\right)^4\left(4^1b^2\right)$

$\frac{\sin\left(x\right)\cos\left(y\right)}{\cos\left(x\right)\sin\left(y\right)}-1=\tan\left(x\right)\cot\left(y\right)-1$

$x^{-3}y^5$

$\left(2a+b-4\right)^2\left(3a-2b-2c\right)^2$

$3y-\frac{6dy}{dx}=4$