$\left(-55\right)-\left(-10\right)-\left(+10\right)$

$5\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)$

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

$\lim_{x\to+3}\left(\frac{1}{3-x}-\frac{4x}{9-x^2}\right)$

$cos\left(360-x\right)=cos\left(x\right)$

$\int\left(4t+3\right)^{2.3}\:dt$

$\int\frac{3}{t^4}\:dt$