$\int_1^e\left(ln\left(4x\right)\right)dx$

$\lim_{x\to0}\left(\frac{e^{\left(2x\right)}-1}{x^2}\right)$

$19-2^2$

$\sin^4\left(x\right)-\cos^4\left(y\right)=2\sin^2\left(x\right)$

$a^2+15a+25$

$csc^2\left(2x\right)-2$

$\left(-9\right)x\left(-11\right)x\left(-5\right)$