$\sec\left(x\right)^4+\tan\left(x\right)^4=\frac{1+\sin\left(x\right)^2}{cos\left(x\right)^2}$

$\left(x^2+7x+5\right)+3x^2+21x+17$

$\frac{p^{6}-q^{6}}{p-q}$

$\sin\left(x\right)+\sin\left(x\right)\cot^2x$

$12x^3+2x^2+6x$

$\frac{6x^4+7x^3+6x^2+32x-7}{3x^2+5x\:-2\:}$

$\int\sin^4\left(3f\right)\cos^4\left(3f\right)df$