$0.2x=7$

$9a^3x^4-27a^2x^4-36a^4x^2$

$5x^2-320$

$10xy+4x^2y$

$\int_0^1\left(\frac{8}{\left(x^2+1\right)\left(x^2+4\right)}\right)dx$

$-\left(12\right)-\left(14\right)-\left(-75\right)+\left(-95\right)$

$\lim_{x\to1}\left(\frac{5sin\left(\pi x\right)}{\ln\left(x^6\right)}\right)$