$\lim_{x\to0}\left(ln\left(x^{sin\left(1-2^x\right)}\right)\right)$

$\frac{x^3}{x^7}+\frac{3}{x^4}$

$\int\frac{5}{x^2\sqrt{16x^2-9}}dx$

$\frac{a^3m-4am+a^3n-4an}{a^4-4a^3-12a^2}$

$\int\left(\frac{\left(x+1\right)}{\left(\left(x-3\right)\left(x+2\right)\right)}\right)dx$

$4g^2-17g+4$

$16a^4b^3c^2-20a^3b^2c^2-36a^2b^2c$