$-30-\left(-5\right)$

$\int\frac{50x^2+400x}{\left(x+4\right)^2\left(x^2+64\right)}dx$

$\left(3x^2y^3-5y^3x\right)^2$

$\left(+5\right)\:-\:\left(-6\right)$

$\lim_{x\to\infty}\sqrt{x^2-6x-4}-\sqrt{x^2-15x-3}$

$\frac{1-w^{11}}{1+w}$

$14sin\left(t\right)cos\left(t\right)=6sin\left(t\right)$