$\lim_{x\to\infty}\left(1+\frac{\left(4\right)}{\left(x\right)}\right)^{0.4x}$

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

$+9-5\cdot\left(-2\right)-3\cdot\left(-1\right)-5\cdot2+7$

$98^2$

$\left(x^2-\frac{9}{2}\right)^2$

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

$5a^2-2a+\:12$