$\left(3x-2y+3z\right)\left(3x+2y-3z\right)$

$4a^3bx+4bx$

$\left(1+5+25+125\right)\cdot4-5\cdot\left(1+6+36+1296-81\cdot9-400\right)$

$\sin\left(x+\frac{\pi}{2}\right)=\frac{3}{4}$

$\frac{\left(3\right)[\left(-7+4\right)-\left(-14+7\right)]}{4}$

$\sqrt{18}\cdot\sqrt{50}\cdot\sqrt{98}$

$\frac{\sin30}{\cos30}+5x\tan30$