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

$\int_{1.9}^{\infty}e^{\left(1.7x\right)}dx$

$\lim_{x\to0}\left(\frac{3x^2}{cos\left(x-1\right)}\right)$

$2\cos\left(x\right)=\sin\left(2x\right)$

$\frac{y^{-7}}{x^7x^8y^{-7}}$

$\left(3\:x^2\:-\:2\:x^3\right)^2$

$81x^8+72x^4+16$