$\int\sin^3\left(x\right)\cdot\cos^4\left(x\right)dx$

$\frac{15a^6}{35a^2}$

$\lim_{x\to\infty}\left(5^x-\sqrt{5^x+25^x+125}\right)$

$\int_1^{\infty}\left(\frac{ln\left(x\right)}{e^{2x}}\right)dx$

$\frac{3x-6}{2x-2}\ge3$

$cos\left(398\right)cos\left(173\right)+sin\left(398\right)sin\left(173\right)$

$\frac{a^3-a^2+2}{a+1}$