$$5x^5y-405x$$

$$\int\frac{5x-4}{\left(x+3\right)\left(x-2\right)}dx$$

$$\int\frac{x}{\sqrt{3x+7}}dx$$

$$-15-3-\left(-20\right)$$

$$19-\left(-8\right)$$

$$\log_a\left(7-12x\right)-\log_a\left(2x+3\right)=\log_a\left(7x-1\right)$$

$$1w$$