$\frac{7b^6}{28d^6}$

$\left(6a-5b\right)\left(2a-3b\right)$

$\frac{sin\:a-cos\:a\:+1}{sin\:a+cos\:a-1}=\frac{sin\:a+1}{cos\:a}$

$\int xe^{x^2}\tan\left(e^{x^2}\right)\sec\left(e^{x^2}\right)dx$

$-4x^2+4x-1$

$\int-12x^2\:\left(-4x^3+2\right)^{-3}\:\:dx$

$\int\left(x^{\frac{1}{3}}\left(x^{\frac{4}{3}}+5\right)^8\right)dx$