$\left(r^3+w^2\right)\left(r^3-w^2\right)$

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

$\sqrt{4}+25-4^2-34$

$5-6\cdot\left(2-7\right)$

$\frac{1-sen\left(x\right)}{1+sen\left(x\right)}+\frac{1+sen\left(x\right)}{1-sen\left(x\right)}-2$

$100.35=x^2+100.48$

$\lim_{x\to0}\left(\frac{\cos\left(x\right)sin\left(x\right)}{x^2}\right)$