$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:58y-34y+x+x$

$69.89\cdot71.08$

$2a^2-\frac{5}{3}a+a-3a^2-6a^2$

$\:15x^2-160x+48\ge\:0$

$\frac{dy}{dx}=\frac{\pi\left(1+x^2\right)t}{12\left(1-t^2\right)^{\frac{1}{2}}}$

$\frac{\sec\left(x\right)+\cos\left(x\right)}{\sec\left(x\right)}=\cos^2x+1$

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