$x+3\sqrt{x^4}-2x^3+3x^2+4x-1$

$\sin\left(-\frac{5}{6}\right)^2+\cos\left(x\right)^2=1$

$f\left(x\right)=\left(2x^2+x\right)^3$

$\lim_{x\to\infty}\left(\frac{x^2-3}{x^2+x}\right)^{2x+1}$

$2.9=y-6.3$

$\left(2x+10y\right)\left(2x-10y\right)$

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