i4 \( \int 3 x^{4} d x \) 7) \( \int \frac{2}{\sqrt{x}} \cdot x \) 4) \( \left\{y^{3}\left(2 y^{2}-5\right) d\left\{\int x^{1 / 2}(x)\right.\right. \) 47) \( \left\{\left(9 x^{2}-3 z-6 x-1\right) d r\right. \) \( 31 \int 2 x^{3} d x \) 8) \( \int \frac{1}{\sqrt{3}} d y \) v) \( \int \frac{1}{x^{2}} d t \) 1) \( \int 6 t^{?} \sqrt{t} d t \) 15) \( \int\left(8 x^{4}+42^{3}-6 x^{2}-7 x+5\right) d x \) 9) \( \int \frac{1}{x} d t \) (0) \( \{17 x \sqrt[3]{8} d x \) 16) \( \int f(x+1) d x \) (1) \( \int 5 u^{2} d u \) 11) \( \left\{\left(4 x^{3}+2^{2}\right) d x\right. \) (7) \( \left.\int \sqrt{x}-\frac{1}{\sqrt{x}}\right) d x \) 6) \( \int\left(x^{2} \sqrt{x} d x\right. \) (2) \( \int\left(30^{0}-2 u^{0}\right) d \) 18) \( \int\left(3-\frac{1}{x^{7}}+\frac{1}{x^{2}}\right) d x \)