$\left(3x^a+\frac{2}{7}y^2\right)^2$

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

$\frac{2-cot^2x}{cscx^2}-1$

$\int\left(\left(\frac{1}{\sqrt{7s+3}}\right)\right)ds$

$3-\left(\left(-8\right)\right)$

$m^3-4m^2n+5m^3-7mn^2-4m^2n+5m^3$

$\frac{sec^4x+tan^4x}{sec^2xtan^2x}$